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Finding the Fourth Proportional to 165,095.80, 247,643.70 and 40,436.80

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Solution

The fourth proportional to 165,095.80, 247,643.70 and 40,436.80 is: 60,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,095.80 : 247,643.70 = 40,436.80 : x
  2. Step 2: Convert to fraction form
    165,095.80/247,643.70 = 40,436.80/x
  3. Step 3: Cross multiply
    165,095.80x = 247,643.70 × 40,436.80
  4. Step 4: Simplify right side
    165,095.80x = 10,013,918,768.16
  5. Step 5: Solve for x
    x = 10,013,918,768.16/165,095.80
  6. Step 6: Final answer
    x = 60,655.20

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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.