Home / 129,133.16-193,283.10-66,717.80

Finding the Fourth Proportional to 129,133.16, 193,283.10 and 66,717.80

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Solution

The fourth proportional to 129,133.16, 193,283.10 and 66,717.80 is: 99,861.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,133.16 : 193,283.10 = 66,717.80 : x
  2. Step 2: Convert to fraction form
    129,133.16/193,283.10 = 66,717.80/x
  3. Step 3: Cross multiply
    129,133.16x = 193,283.10 × 66,717.80
  4. Step 4: Simplify right side
    129,133.16x = 12,895,423,209.18
  5. Step 5: Solve for x
    x = 12,895,423,209.18/129,133.16
  6. Step 6: Final answer
    x = 99,861.44

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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.