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Finding the Fourth Proportional to 113,485.40, 169,920.90 and 88,909.40

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Solution

The fourth proportional to 113,485.40, 169,920.90 and 88,909.40 is: 133,123.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,485.40 : 169,920.90 = 88,909.40 : x
  2. Step 2: Convert to fraction form
    113,485.40/169,920.90 = 88,909.40/x
  3. Step 3: Cross multiply
    113,485.40x = 169,920.90 × 88,909.40
  4. Step 4: Simplify right side
    113,485.40x = 15,107,565,266.46
  5. Step 5: Solve for x
    x = 15,107,565,266.46/113,485.40
  6. Step 6: Final answer
    x = 133,123.43

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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.