Home / 125,111.78-172,647.41-74,129.21

Finding the Fourth Proportional to 125,111.78, 172,647.41 and 74,129.21

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Solution

The fourth proportional to 125,111.78, 172,647.41 and 74,129.21 is: 102,294.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,111.78 : 172,647.41 = 74,129.21 : x
  2. Step 2: Convert to fraction form
    125,111.78/172,647.41 = 74,129.21/x
  3. Step 3: Cross multiply
    125,111.78x = 172,647.41 × 74,129.21
  4. Step 4: Simplify right side
    125,111.78x = 12,798,214,877.96
  5. Step 5: Solve for x
    x = 12,798,214,877.96/125,111.78
  6. Step 6: Final answer
    x = 102,294.25

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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.