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Finding the Fourth Proportional to 156,988.94, 216,646.65 and 85,370.76

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Solution

The fourth proportional to 156,988.94, 216,646.65 and 85,370.76 is: 117,812.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,988.94 : 216,646.65 = 85,370.76 : x
  2. Step 2: Convert to fraction form
    156,988.94/216,646.65 = 85,370.76/x
  3. Step 3: Cross multiply
    156,988.94x = 216,646.65 × 85,370.76
  4. Step 4: Simplify right side
    156,988.94x = 18,495,289,161.95
  5. Step 5: Solve for x
    x = 18,495,289,161.95/156,988.94
  6. Step 6: Final answer
    x = 117,812.69

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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.