Home / 138,316.86-190,872.12-77,061.60

Finding the Fourth Proportional to 138,316.86, 190,872.12 and 77,061.60

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Solution

The fourth proportional to 138,316.86, 190,872.12 and 77,061.60 is: 106,342.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,316.86 : 190,872.12 = 77,061.60 : x
  2. Step 2: Convert to fraction form
    138,316.86/190,872.12 = 77,061.60/x
  3. Step 3: Cross multiply
    138,316.86x = 190,872.12 × 77,061.60
  4. Step 4: Simplify right side
    138,316.86x = 14,708,910,962.59
  5. Step 5: Solve for x
    x = 14,708,910,962.59/138,316.86
  6. Step 6: Final answer
    x = 106,342.14

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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.