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Finding the Fourth Proportional to 156,471.95, 215,931.34 and 84,851.95

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Solution

The fourth proportional to 156,471.95, 215,931.34 and 84,851.95 is: 117,095.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,471.95 : 215,931.34 = 84,851.95 : x
  2. Step 2: Convert to fraction form
    156,471.95/215,931.34 = 84,851.95/x
  3. Step 3: Cross multiply
    156,471.95x = 215,931.34 × 84,851.95
  4. Step 4: Simplify right side
    156,471.95x = 18,322,194,185.46
  5. Step 5: Solve for x
    x = 18,322,194,185.46/156,471.95
  6. Step 6: Final answer
    x = 117,095.71

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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.