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Finding the Fourth Proportional to 99,390.70, 137,180.55 and 65,402.29

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Solution

The fourth proportional to 99,390.70, 137,180.55 and 65,402.29 is: 90,269.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,390.70 : 137,180.55 = 65,402.29 : x
  2. Step 2: Convert to fraction form
    99,390.70/137,180.55 = 65,402.29/x
  3. Step 3: Cross multiply
    99,390.70x = 137,180.55 × 65,402.29
  4. Step 4: Simplify right side
    99,390.70x = 8,971,922,113.46
  5. Step 5: Solve for x
    x = 8,971,922,113.46/99,390.70
  6. Step 6: Final answer
    x = 90,269.23

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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.