Home / 78,432.35-108,233.64-42,621.57

Finding the Fourth Proportional to 78,432.35, 108,233.64 and 42,621.57

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Solution

The fourth proportional to 78,432.35, 108,233.64 and 42,621.57 is: 58,816.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,432.35 : 108,233.64 = 42,621.57 : x
  2. Step 2: Convert to fraction form
    78,432.35/108,233.64 = 42,621.57/x
  3. Step 3: Cross multiply
    78,432.35x = 108,233.64 × 42,621.57
  4. Step 4: Simplify right side
    78,432.35x = 4,613,087,663.61
  5. Step 5: Solve for x
    x = 4,613,087,663.61/78,432.35
  6. Step 6: Final answer
    x = 58,816.14

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1.5x scale

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.