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Finding the Fourth Proportional to 83,931, 115,791.52 and 58,430.56

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Solution

The fourth proportional to 83,931, 115,791.52 and 58,430.56 is: 80,611.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,931 : 115,791.52 = 58,430.56 : x
  2. Step 2: Convert to fraction form
    83,931/115,791.52 = 58,430.56/x
  3. Step 3: Cross multiply
    83,931x = 115,791.52 × 58,430.56
  4. Step 4: Simplify right side
    83,931x = 6,765,763,356.85
  5. Step 5: Solve for x
    x = 6,765,763,356.85/83,931
  6. Step 6: Final answer
    x = 80,611.02

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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.