Home / 102,921.89-142,119.38-64,693.74

Finding the Fourth Proportional to 102,921.89, 142,119.38 and 64,693.74

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Solution

The fourth proportional to 102,921.89, 142,119.38 and 64,693.74 is: 89,332.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,921.89 : 142,119.38 = 64,693.74 : x
  2. Step 2: Convert to fraction form
    102,921.89/142,119.38 = 64,693.74/x
  3. Step 3: Cross multiply
    102,921.89x = 142,119.38 × 64,693.74
  4. Step 4: Simplify right side
    102,921.89x = 9,194,234,380.42
  5. Step 5: Solve for x
    x = 9,194,234,380.42/102,921.89
  6. Step 6: Final answer
    x = 89,332.16

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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.