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Finding the Fourth Proportional to 81,402.57, 112,339.71 and 45,590.31

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Solution

The fourth proportional to 81,402.57, 112,339.71 and 45,590.31 is: 62,916.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,402.57 : 112,339.71 = 45,590.31 : x
  2. Step 2: Convert to fraction form
    81,402.57/112,339.71 = 45,590.31/x
  3. Step 3: Cross multiply
    81,402.57x = 112,339.71 × 45,590.31
  4. Step 4: Simplify right side
    81,402.57x = 5,121,602,204.21
  5. Step 5: Solve for x
    x = 5,121,602,204.21/81,402.57
  6. Step 6: Final answer
    x = 62,916.96

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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.