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Finding the Fourth Proportional to 215,737.60, 323,491.20 and 90,937.60

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Solution

The fourth proportional to 215,737.60, 323,491.20 and 90,937.60 is: 136,357.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,737.60 : 323,491.20 = 90,937.60 : x
  2. Step 2: Convert to fraction form
    215,737.60/323,491.20 = 90,937.60/x
  3. Step 3: Cross multiply
    215,737.60x = 323,491.20 × 90,937.60
  4. Step 4: Simplify right side
    215,737.60x = 29,417,513,349.12
  5. Step 5: Solve for x
    x = 29,417,513,349.12/215,737.60
  6. Step 6: Final answer
    x = 136,357.84

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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.