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Finding the Fourth Proportional to 128,531.40, 192,797.10 and 99,006.90

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Solution

The fourth proportional to 128,531.40, 192,797.10 and 99,006.90 is: 148,510.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,531.40 : 192,797.10 = 99,006.90 : x
  2. Step 2: Convert to fraction form
    128,531.40/192,797.10 = 99,006.90/x
  3. Step 3: Cross multiply
    128,531.40x = 192,797.10 × 99,006.90
  4. Step 4: Simplify right side
    128,531.40x = 19,088,243,199.99
  5. Step 5: Solve for x
    x = 19,088,243,199.99/128,531.40
  6. Step 6: Final answer
    x = 148,510.35

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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.