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Finding the Fourth Proportional to 52,411.60, 78,444.60 and 40,661.20

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Solution

The fourth proportional to 52,411.60, 78,444.60 and 40,661.20 is: 60,857.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,411.60 : 78,444.60 = 40,661.20 : x
  2. Step 2: Convert to fraction form
    52,411.60/78,444.60 = 40,661.20/x
  3. Step 3: Cross multiply
    52,411.60x = 78,444.60 × 40,661.20
  4. Step 4: Simplify right side
    52,411.60x = 3,189,651,569.52
  5. Step 5: Solve for x
    x = 3,189,651,569.52/52,411.60
  6. Step 6: Final answer
    x = 60,857.74

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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.