Home / 260,640,934.40-390,861,868.80-78,827,686.40

Finding the Fourth Proportional to 260,640,934.40, 390,861,868.80 and 78,827,686.40

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Solution

The fourth proportional to 260,640,934.40, 390,861,868.80 and 78,827,686.40 is: 118,211,427.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,640,934.40 : 390,861,868.80 = 78,827,686.40 : x
  2. Step 2: Convert to fraction form
    260,640,934.40/390,861,868.80 = 78,827,686.40/x
  3. Step 3: Cross multiply
    260,640,934.40x = 390,861,868.80 × 78,827,686.40
  4. Step 4: Simplify right side
    260,640,934.40x = 30,810,736,819,484,348
  5. Step 5: Solve for x
    x = 30,810,736,819,484,348/260,640,934.40
  6. Step 6: Final answer
    x = 118,211,427.11

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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.