Home / 139,939.76-192,981.20-88,862.40

Finding the Fourth Proportional to 139,939.76, 192,981.20 and 88,862.40

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Solution

The fourth proportional to 139,939.76, 192,981.20 and 88,862.40 is: 122,543.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,939.76 : 192,981.20 = 88,862.40 : x
  2. Step 2: Convert to fraction form
    139,939.76/192,981.20 = 88,862.40/x
  3. Step 3: Cross multiply
    139,939.76x = 192,981.20 × 88,862.40
  4. Step 4: Simplify right side
    139,939.76x = 17,148,772,586.88
  5. Step 5: Solve for x
    x = 17,148,772,586.88/139,939.76
  6. Step 6: Final answer
    x = 122,543.96

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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.