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Finding the Fourth Proportional to 66,545.19, 91,832.49 and 42,671.88

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Solution

The fourth proportional to 66,545.19, 91,832.49 and 42,671.88 is: 58,887.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,545.19 : 91,832.49 = 42,671.88 : x
  2. Step 2: Convert to fraction form
    66,545.19/91,832.49 = 42,671.88/x
  3. Step 3: Cross multiply
    66,545.19x = 91,832.49 × 42,671.88
  4. Step 4: Simplify right side
    66,545.19x = 3,918,664,993.38
  5. Step 5: Solve for x
    x = 3,918,664,993.38/66,545.19
  6. Step 6: Final answer
    x = 58,887.28

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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.