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Finding the Fourth Proportional to 81,339.78, 112,248.90 and 45,529.80

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Solution

The fourth proportional to 81,339.78, 112,248.90 and 45,529.80 is: 62,831.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,339.78 : 112,248.90 = 45,529.80 : x
  2. Step 2: Convert to fraction form
    81,339.78/112,248.90 = 45,529.80/x
  3. Step 3: Cross multiply
    81,339.78x = 112,248.90 × 45,529.80
  4. Step 4: Simplify right side
    81,339.78x = 5,110,669,967.22
  5. Step 5: Solve for x
    x = 5,110,669,967.22/81,339.78
  6. Step 6: Final answer
    x = 62,831.13

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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.