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Finding the Fourth Proportional to 125,010, 172,513.80 and 68,421.38

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Solution

The fourth proportional to 125,010, 172,513.80 and 68,421.38 is: 94,421.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,010 : 172,513.80 = 68,421.38 : x
  2. Step 2: Convert to fraction form
    125,010/172,513.80 = 68,421.38/x
  3. Step 3: Cross multiply
    125,010x = 172,513.80 × 68,421.38
  4. Step 4: Simplify right side
    125,010x = 11,803,631,402.48
  5. Step 5: Solve for x
    x = 11,803,631,402.48/125,010
  6. Step 6: Final answer
    x = 94,421.50

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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.