Home / 128,514.18-177,350.10-71,925.50

Finding the Fourth Proportional to 128,514.18, 177,350.10 and 71,925.50

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Solution

The fourth proportional to 128,514.18, 177,350.10 and 71,925.50 is: 99,257.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,514.18 : 177,350.10 = 71,925.50 : x
  2. Step 2: Convert to fraction form
    128,514.18/177,350.10 = 71,925.50/x
  3. Step 3: Cross multiply
    128,514.18x = 177,350.10 × 71,925.50
  4. Step 4: Simplify right side
    128,514.18x = 12,755,994,617.55
  5. Step 5: Solve for x
    x = 12,755,994,617.55/128,514.18
  6. Step 6: Final answer
    x = 99,257.49

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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.