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Finding the Fourth Proportional to 89,123.60, 133,685.40 and 71,627.60

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Solution

The fourth proportional to 89,123.60, 133,685.40 and 71,627.60 is: 107,441.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,123.60 : 133,685.40 = 71,627.60 : x
  2. Step 2: Convert to fraction form
    89,123.60/133,685.40 = 71,627.60/x
  3. Step 3: Cross multiply
    89,123.60x = 133,685.40 × 71,627.60
  4. Step 4: Simplify right side
    89,123.60x = 9,575,564,357.04
  5. Step 5: Solve for x
    x = 9,575,564,357.04/89,123.60
  6. Step 6: Final answer
    x = 107,441.40

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1.5x scale

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.