Home / 260,659,430.40-390,889,612.80-78,846,182.40

Finding the Fourth Proportional to 260,659,430.40, 390,889,612.80 and 78,846,182.40

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Solution

The fourth proportional to 260,659,430.40, 390,889,612.80 and 78,846,182.40 is: 118,239,166.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,659,430.40 : 390,889,612.80 = 78,846,182.40 : x
  2. Step 2: Convert to fraction form
    260,659,430.40/390,889,612.80 = 78,846,182.40/x
  3. Step 3: Cross multiply
    260,659,430.40x = 390,889,612.80 × 78,846,182.40
  4. Step 4: Simplify right side
    260,659,430.40x = 30,820,153,709,094,176
  5. Step 5: Solve for x
    x = 30,820,153,709,094,176/260,659,430.40
  6. Step 6: Final answer
    x = 118,239,166.19

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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.