Home / 260,660,000.40-390,890,467.80-78,846,752.40

Finding the Fourth Proportional to 260,660,000.40, 390,890,467.80 and 78,846,752.40

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Solution

The fourth proportional to 260,660,000.40, 390,890,467.80 and 78,846,752.40 is: 118,240,021.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,660,000.40 : 390,890,467.80 = 78,846,752.40 : x
  2. Step 2: Convert to fraction form
    260,660,000.40/390,890,467.80 = 78,846,752.40/x
  3. Step 3: Cross multiply
    260,660,000.40x = 390,890,467.80 × 78,846,752.40
  4. Step 4: Simplify right side
    260,660,000.40x = 30,820,443,930,146,776
  5. Step 5: Solve for x
    x = 30,820,443,930,146,776/260,660,000.40
  6. Step 6: Final answer
    x = 118,240,021.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.