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Finding the Fourth Proportional to 128,525.40, 192,788.10 and 99,000.90

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Solution

The fourth proportional to 128,525.40, 192,788.10 and 99,000.90 is: 148,501.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,525.40 : 192,788.10 = 99,000.90 : x
  2. Step 2: Convert to fraction form
    128,525.40/192,788.10 = 99,000.90/x
  3. Step 3: Cross multiply
    128,525.40x = 192,788.10 × 99,000.90
  4. Step 4: Simplify right side
    128,525.40x = 19,086,195,409.29
  5. Step 5: Solve for x
    x = 19,086,195,409.29/128,525.40
  6. Step 6: Final answer
    x = 148,501.35

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Similar ratio
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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.