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Finding the Fourth Proportional to 156,900.49, 216,525.13 and 85,280.69

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Solution

The fourth proportional to 156,900.49, 216,525.13 and 85,280.69 is: 117,688.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,900.49 : 216,525.13 = 85,280.69 : x
  2. Step 2: Convert to fraction form
    156,900.49/216,525.13 = 85,280.69/x
  3. Step 3: Cross multiply
    156,900.49x = 216,525.13 × 85,280.69
  4. Step 4: Simplify right side
    156,900.49x = 18,465,412,488.74
  5. Step 5: Solve for x
    x = 18,465,412,488.74/156,900.49
  6. Step 6: Final answer
    x = 117,688.69

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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.