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Finding the Fourth Proportional to 71,365.57, 98,484.86 and 40,320.95

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Solution

The fourth proportional to 71,365.57, 98,484.86 and 40,320.95 is: 55,643.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,365.57 : 98,484.86 = 40,320.95 : x
  2. Step 2: Convert to fraction form
    71,365.57/98,484.86 = 40,320.95/x
  3. Step 3: Cross multiply
    71,365.57x = 98,484.86 × 40,320.95
  4. Step 4: Simplify right side
    71,365.57x = 3,971,003,462.83
  5. Step 5: Solve for x
    x = 3,971,003,462.83/71,365.57
  6. Step 6: Final answer
    x = 55,643.13

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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.