Home / 156,931.15-216,567.13-85,312.71

Finding the Fourth Proportional to 156,931.15, 216,567.13 and 85,312.71

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Solution

The fourth proportional to 156,931.15, 216,567.13 and 85,312.71 is: 117,732.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,931.15 : 216,567.13 = 85,312.71 : x
  2. Step 2: Convert to fraction form
    156,931.15/216,567.13 = 85,312.71/x
  3. Step 3: Cross multiply
    156,931.15x = 216,567.13 × 85,312.71
  4. Step 4: Simplify right side
    156,931.15x = 18,475,928,757.22
  5. Step 5: Solve for x
    x = 18,475,928,757.22/156,931.15
  6. Step 6: Final answer
    x = 117,732.70

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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.