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Finding the Fourth Proportional to 156,901.55, 216,525.83 and 85,281.60

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Solution

The fourth proportional to 156,901.55, 216,525.83 and 85,281.60 is: 117,689.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,901.55 : 216,525.83 = 85,281.60 : x
  2. Step 2: Convert to fraction form
    156,901.55/216,525.83 = 85,281.60/x
  3. Step 3: Cross multiply
    156,901.55x = 216,525.83 × 85,281.60
  4. Step 4: Simplify right side
    156,901.55x = 18,465,669,223.73
  5. Step 5: Solve for x
    x = 18,465,669,223.73/156,901.55
  6. Step 6: Final answer
    x = 117,689.53

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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.