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Finding the Fourth Proportional to 83,109.80, 124,664.70 and 74,124.20

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Solution

The fourth proportional to 83,109.80, 124,664.70 and 74,124.20 is: 111,186.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,109.80 : 124,664.70 = 74,124.20 : x
  2. Step 2: Convert to fraction form
    83,109.80/124,664.70 = 74,124.20/x
  3. Step 3: Cross multiply
    83,109.80x = 124,664.70 × 74,124.20
  4. Step 4: Simplify right side
    83,109.80x = 9,240,671,155.74
  5. Step 5: Solve for x
    x = 9,240,671,155.74/83,109.80
  6. Step 6: Final answer
    x = 111,186.30

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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.