Home / 115,156.90-172,345.20-70,811.74

Finding the Fourth Proportional to 115,156.90, 172,345.20 and 70,811.74

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Solution

The fourth proportional to 115,156.90, 172,345.20 and 70,811.74 is: 105,977.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,156.90 : 172,345.20 = 70,811.74 : x
  2. Step 2: Convert to fraction form
    115,156.90/172,345.20 = 70,811.74/x
  3. Step 3: Cross multiply
    115,156.90x = 172,345.20 × 70,811.74
  4. Step 4: Simplify right side
    115,156.90x = 12,204,063,492.65
  5. Step 5: Solve for x
    x = 12,204,063,492.65/115,156.90
  6. Step 6: Final answer
    x = 105,977.70

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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.