Home / 117,869,962.38-162,727,970.55-78,231,247.12

Finding the Fourth Proportional to 117,869,962.38, 162,727,970.55 and 78,231,247.12

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Solution

The fourth proportional to 117,869,962.38, 162,727,970.55 and 78,231,247.12 is: 108,003,869.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,869,962.38 : 162,727,970.55 = 78,231,247.12 : x
  2. Step 2: Convert to fraction form
    117,869,962.38/162,727,970.55 = 78,231,247.12/x
  3. Step 3: Cross multiply
    117,869,962.38x = 162,727,970.55 × 78,231,247.12
  4. Step 4: Simplify right side
    117,869,962.38x = 12,730,412,077,433,134
  5. Step 5: Solve for x
    x = 12,730,412,077,433,134/117,869,962.38
  6. Step 6: Final answer
    x = 108,003,869.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.