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Finding the Fourth Proportional to 155,937.66, 215,193.64 and 87,954.42

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Solution

The fourth proportional to 155,937.66, 215,193.64 and 87,954.42 is: 121,376.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,937.66 : 215,193.64 = 87,954.42 : x
  2. Step 2: Convert to fraction form
    155,937.66/215,193.64 = 87,954.42/x
  3. Step 3: Cross multiply
    155,937.66x = 215,193.64 × 87,954.42
  4. Step 4: Simplify right side
    155,937.66x = 18,927,231,793.89
  5. Step 5: Solve for x
    x = 18,927,231,793.89/155,937.66
  6. Step 6: Final answer
    x = 121,376.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.