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Finding the Fourth Proportional to 156,876.74, 216,491.56 and 85,256.76

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Solution

The fourth proportional to 156,876.74, 216,491.56 and 85,256.76 is: 117,655.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,876.74 : 216,491.56 = 85,256.76 : x
  2. Step 2: Convert to fraction form
    156,876.74/216,491.56 = 85,256.76/x
  3. Step 3: Cross multiply
    156,876.74x = 216,491.56 × 85,256.76
  4. Step 4: Simplify right side
    156,876.74x = 18,457,368,972.95
  5. Step 5: Solve for x
    x = 18,457,368,972.95/156,876.74
  6. Step 6: Final answer
    x = 117,655.23

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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.