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Finding the Fourth Proportional to 128,532.90, 192,799.35 and 99,008.40

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Solution

The fourth proportional to 128,532.90, 192,799.35 and 99,008.40 is: 148,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,532.90 : 192,799.35 = 99,008.40 : x
  2. Step 2: Convert to fraction form
    128,532.90/192,799.35 = 99,008.40/x
  3. Step 3: Cross multiply
    128,532.90x = 192,799.35 × 99,008.40
  4. Step 4: Simplify right side
    128,532.90x = 19,088,755,164.54
  5. Step 5: Solve for x
    x = 19,088,755,164.54/128,532.90
  6. Step 6: Final answer
    x = 148,512.60

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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.