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Finding the Fourth Proportional to 125,020.67, 172,521.90 and 68,421.11

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Solution

The fourth proportional to 125,020.67, 172,521.90 and 68,421.11 is: 94,417.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,020.67 : 172,521.90 = 68,421.11 : x
  2. Step 2: Convert to fraction form
    125,020.67/172,521.90 = 68,421.11/x
  3. Step 3: Cross multiply
    125,020.67x = 172,521.90 × 68,421.11
  4. Step 4: Simplify right side
    125,020.67x = 11,804,139,034.70
  5. Step 5: Solve for x
    x = 11,804,139,034.70/125,020.67
  6. Step 6: Final answer
    x = 94,417.50

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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.