Home / 125,108.78-172,643.27-74,126.21

Finding the Fourth Proportional to 125,108.78, 172,643.27 and 74,126.21

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Solution

The fourth proportional to 125,108.78, 172,643.27 and 74,126.21 is: 102,290.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,108.78 : 172,643.27 = 74,126.21 : x
  2. Step 2: Convert to fraction form
    125,108.78/172,643.27 = 74,126.21/x
  3. Step 3: Cross multiply
    125,108.78x = 172,643.27 × 74,126.21
  4. Step 4: Simplify right side
    125,108.78x = 12,797,390,053.26
  5. Step 5: Solve for x
    x = 12,797,390,053.26/125,108.78
  6. Step 6: Final answer
    x = 102,290.11

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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.