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Finding the Fourth Proportional to 156,876.85, 216,491.72 and 85,256.87

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Solution

The fourth proportional to 156,876.85, 216,491.72 and 85,256.87 is: 117,655.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,876.85 : 216,491.72 = 85,256.87 : x
  2. Step 2: Convert to fraction form
    156,876.85/216,491.72 = 85,256.87/x
  3. Step 3: Cross multiply
    156,876.85x = 216,491.72 × 85,256.87
  4. Step 4: Simplify right side
    156,876.85x = 18,457,406,428.12
  5. Step 5: Solve for x
    x = 18,457,406,428.12/156,876.85
  6. Step 6: Final answer
    x = 117,655.39

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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.