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Finding the Fourth Proportional to 112,139.70, 168,209.55 and 99,673.80

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Solution

The fourth proportional to 112,139.70, 168,209.55 and 99,673.80 is: 149,510.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,139.70 : 168,209.55 = 99,673.80 : x
  2. Step 2: Convert to fraction form
    112,139.70/168,209.55 = 99,673.80/x
  3. Step 3: Cross multiply
    112,139.70x = 168,209.55 × 99,673.80
  4. Step 4: Simplify right side
    112,139.70x = 16,766,085,044.79
  5. Step 5: Solve for x
    x = 16,766,085,044.79/112,139.70
  6. Step 6: Final answer
    x = 149,510.70

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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.