Home / 124,709.15-172,155.28-79,449.20

Finding the Fourth Proportional to 124,709.15, 172,155.28 and 79,449.20

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Solution

The fourth proportional to 124,709.15, 172,155.28 and 79,449.20 is: 109,675.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,709.15 : 172,155.28 = 79,449.20 : x
  2. Step 2: Convert to fraction form
    124,709.15/172,155.28 = 79,449.20/x
  3. Step 3: Cross multiply
    124,709.15x = 172,155.28 × 79,449.20
  4. Step 4: Simplify right side
    124,709.15x = 13,677,598,212.38
  5. Step 5: Solve for x
    x = 13,677,598,212.38/124,709.15
  6. Step 6: Final answer
    x = 109,675.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.