Home / 128,330.70-192,545.25-53,430.72

Finding the Fourth Proportional to 128,330.70, 192,545.25 and 53,430.72

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Solution

The fourth proportional to 128,330.70, 192,545.25 and 53,430.72 is: 80,166.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,330.70 : 192,545.25 = 53,430.72 : x
  2. Step 2: Convert to fraction form
    128,330.70/192,545.25 = 53,430.72/x
  3. Step 3: Cross multiply
    128,330.70x = 192,545.25 × 53,430.72
  4. Step 4: Simplify right side
    128,330.70x = 10,287,831,340.08
  5. Step 5: Solve for x
    x = 10,287,831,340.08/128,330.70
  6. Step 6: Final answer
    x = 80,166.56

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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.