Home / 115,168.18-172,429.62-86,999.62

Finding the Fourth Proportional to 115,168.18, 172,429.62 and 86,999.62

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Solution

The fourth proportional to 115,168.18, 172,429.62 and 86,999.62 is: 130,255.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,168.18 : 172,429.62 = 86,999.62 : x
  2. Step 2: Convert to fraction form
    115,168.18/172,429.62 = 86,999.62/x
  3. Step 3: Cross multiply
    115,168.18x = 172,429.62 × 86,999.62
  4. Step 4: Simplify right side
    115,168.18x = 15,001,311,416.74
  5. Step 5: Solve for x
    x = 15,001,311,416.74/115,168.18
  6. Step 6: Final answer
    x = 130,255.70

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1.5x scale

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.