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Finding the Fourth Proportional to 135,030.10, 202,545.15 and 128,469.10

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Solution

The fourth proportional to 135,030.10, 202,545.15 and 128,469.10 is: 192,703.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,030.10 : 202,545.15 = 128,469.10 : x
  2. Step 2: Convert to fraction form
    135,030.10/202,545.15 = 128,469.10/x
  3. Step 3: Cross multiply
    135,030.10x = 202,545.15 × 128,469.10
  4. Step 4: Simplify right side
    135,030.10x = 26,020,793,129.87
  5. Step 5: Solve for x
    x = 26,020,793,129.87/135,030.10
  6. Step 6: Final answer
    x = 192,703.65

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1.5x scale

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.