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Finding the Fourth Proportional to 88,143, 121,637.34 and 48,399

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Solution

The fourth proportional to 88,143, 121,637.34 and 48,399 is: 66,790.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,143 : 121,637.34 = 48,399 : x
  2. Step 2: Convert to fraction form
    88,143/121,637.34 = 48,399/x
  3. Step 3: Cross multiply
    88,143x = 121,637.34 × 48,399
  4. Step 4: Simplify right side
    88,143x = 5,887,125,618.66
  5. Step 5: Solve for x
    x = 5,887,125,618.66/88,143
  6. Step 6: Final answer
    x = 66,790.62

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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.