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Finding the Fourth Proportional to 71,685.77, 98,953.79 and 47,803.73

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Solution

The fourth proportional to 71,685.77, 98,953.79 and 47,803.73 is: 65,987.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,685.77 : 98,953.79 = 47,803.73 : x
  2. Step 2: Convert to fraction form
    71,685.77/98,953.79 = 47,803.73/x
  3. Step 3: Cross multiply
    71,685.77x = 98,953.79 × 47,803.73
  4. Step 4: Simplify right side
    71,685.77x = 4,730,359,525.85
  5. Step 5: Solve for x
    x = 4,730,359,525.85/71,685.77
  6. Step 6: Final answer
    x = 65,987.43

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1.5x scale

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.