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Finding the Fourth Proportional to 125,178.48, 172,703.16 and 71,424.72

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Solution

The fourth proportional to 125,178.48, 172,703.16 and 71,424.72 is: 98,541.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,178.48 : 172,703.16 = 71,424.72 : x
  2. Step 2: Convert to fraction form
    125,178.48/172,703.16 = 71,424.72/x
  3. Step 3: Cross multiply
    125,178.48x = 172,703.16 × 71,424.72
  4. Step 4: Simplify right side
    125,178.48x = 12,335,274,846.12
  5. Step 5: Solve for x
    x = 12,335,274,846.12/125,178.48
  6. Step 6: Final answer
    x = 98,541.50

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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.