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Finding the Fourth Proportional to 112,737.40, 169,188.11 and 90,815.45

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Solution

The fourth proportional to 112,737.40, 169,188.11 and 90,815.45 is: 136,289.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,737.40 : 169,188.11 = 90,815.45 : x
  2. Step 2: Convert to fraction form
    112,737.40/169,188.11 = 90,815.45/x
  3. Step 3: Cross multiply
    112,737.40x = 169,188.11 × 90,815.45
  4. Step 4: Simplify right side
    112,737.40x = 15,364,894,344.30
  5. Step 5: Solve for x
    x = 15,364,894,344.30/112,737.40
  6. Step 6: Final answer
    x = 136,289.24

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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.