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Finding the Fourth Proportional to 66,488.78, 91,746.27 and 40,660.31

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Solution

The fourth proportional to 66,488.78, 91,746.27 and 40,660.31 is: 56,106.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,488.78 : 91,746.27 = 40,660.31 : x
  2. Step 2: Convert to fraction form
    66,488.78/91,746.27 = 40,660.31/x
  3. Step 3: Cross multiply
    66,488.78x = 91,746.27 × 40,660.31
  4. Step 4: Simplify right side
    66,488.78x = 3,730,432,008.91
  5. Step 5: Solve for x
    x = 3,730,432,008.91/66,488.78
  6. Step 6: Final answer
    x = 56,106.19

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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.