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Finding the Fourth Proportional to 66,549.59, 91,879.88 and 42,364.20

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Solution

The fourth proportional to 66,549.59, 91,879.88 and 42,364.20 is: 58,488.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,549.59 : 91,879.88 = 42,364.20 : x
  2. Step 2: Convert to fraction form
    66,549.59/91,879.88 = 42,364.20/x
  3. Step 3: Cross multiply
    66,549.59x = 91,879.88 × 42,364.20
  4. Step 4: Simplify right side
    66,549.59x = 3,892,417,612.30
  5. Step 5: Solve for x
    x = 3,892,417,612.30/66,549.59
  6. Step 6: Final answer
    x = 58,488.98

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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.