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Finding the Fourth Proportional to 125,018.68, 172,530.54 and 71,312.44

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Solution

The fourth proportional to 125,018.68, 172,530.54 and 71,312.44 is: 98,413.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,018.68 : 172,530.54 = 71,312.44 : x
  2. Step 2: Convert to fraction form
    125,018.68/172,530.54 = 71,312.44/x
  3. Step 3: Cross multiply
    125,018.68x = 172,530.54 × 71,312.44
  4. Step 4: Simplify right side
    125,018.68x = 12,303,573,781.92
  5. Step 5: Solve for x
    x = 12,303,573,781.92/125,018.68
  6. Step 6: Final answer
    x = 98,413.88

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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.