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Finding the Fourth Proportional to 78,411.70, 117,617.55 and 52,030.90

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Solution

The fourth proportional to 78,411.70, 117,617.55 and 52,030.90 is: 78,046.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,411.70 : 117,617.55 = 52,030.90 : x
  2. Step 2: Convert to fraction form
    78,411.70/117,617.55 = 52,030.90/x
  3. Step 3: Cross multiply
    78,411.70x = 117,617.55 × 52,030.90
  4. Step 4: Simplify right side
    78,411.70x = 6,119,746,982.30
  5. Step 5: Solve for x
    x = 6,119,746,982.30/78,411.70
  6. Step 6: Final answer
    x = 78,046.35

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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.