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Finding the Fourth Proportional to 74,871.60, 112,255.38 and 28,111.92

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Solution

The fourth proportional to 74,871.60, 112,255.38 and 28,111.92 is: 42,148.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,871.60 : 112,255.38 = 28,111.92 : x
  2. Step 2: Convert to fraction form
    74,871.60/112,255.38 = 28,111.92/x
  3. Step 3: Cross multiply
    74,871.60x = 112,255.38 × 28,111.92
  4. Step 4: Simplify right side
    74,871.60x = 3,155,714,262.13
  5. Step 5: Solve for x
    x = 3,155,714,262.13/74,871.60
  6. Step 6: Final answer
    x = 42,148.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.