Home / 115,337.21-172,865.52-81,612.95

Finding the Fourth Proportional to 115,337.21, 172,865.52 and 81,612.95

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Solution

The fourth proportional to 115,337.21, 172,865.52 and 81,612.95 is: 122,320.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,337.21 : 172,865.52 = 81,612.95 : x
  2. Step 2: Convert to fraction form
    115,337.21/172,865.52 = 81,612.95/x
  3. Step 3: Cross multiply
    115,337.21x = 172,865.52 × 81,612.95
  4. Step 4: Simplify right side
    115,337.21x = 14,108,064,176.16
  5. Step 5: Solve for x
    x = 14,108,064,176.16/115,337.21
  6. Step 6: Final answer
    x = 122,320.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.