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Finding the Fourth Proportional to 128,937.57, 193,407.65 and 38,981.01

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Solution

The fourth proportional to 128,937.57, 193,407.65 and 38,981.01 is: 58,471.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,937.57 : 193,407.65 = 38,981.01 : x
  2. Step 2: Convert to fraction form
    128,937.57/193,407.65 = 38,981.01/x
  3. Step 3: Cross multiply
    128,937.57x = 193,407.65 × 38,981.01
  4. Step 4: Simplify right side
    128,937.57x = 7,539,225,343.82
  5. Step 5: Solve for x
    x = 7,539,225,343.82/128,937.57
  6. Step 6: Final answer
    x = 58,471.90

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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.