Home / 639,720,805.86-959,581,208.79-155,046,613.86

Finding the Fourth Proportional to 639,720,805.86, 959,581,208.79 and 155,046,613.86

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Solution

The fourth proportional to 639,720,805.86, 959,581,208.79 and 155,046,613.86 is: 232,569,920.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,720,805.86 : 959,581,208.79 = 155,046,613.86 : x
  2. Step 2: Convert to fraction form
    639,720,805.86/959,581,208.79 = 155,046,613.86/x
  3. Step 3: Cross multiply
    639,720,805.86x = 959,581,208.79 × 155,046,613.86
  4. Step 4: Simplify right side
    639,720,805.86x = 148,779,817,146,575,168
  5. Step 5: Solve for x
    x = 148,779,817,146,575,168/639,720,805.86
  6. Step 6: Final answer
    x = 232,569,920.79

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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.