Home / 256,710,643.20-385,024,646.40-74,915,212.80

Finding the Fourth Proportional to 256,710,643.20, 385,024,646.40 and 74,915,212.80

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Solution

The fourth proportional to 256,710,643.20, 385,024,646.40 and 74,915,212.80 is: 112,360,761.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,710,643.20 : 385,024,646.40 = 74,915,212.80 : x
  2. Step 2: Convert to fraction form
    256,710,643.20/385,024,646.40 = 74,915,212.80/x
  3. Step 3: Cross multiply
    256,710,643.20x = 385,024,646.40 × 74,915,212.80
  4. Step 4: Simplify right side
    256,710,643.20x = 28,844,203,318,300,752
  5. Step 5: Solve for x
    x = 28,844,203,318,300,752/256,710,643.20
  6. Step 6: Final answer
    x = 112,360,761.36

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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.