Home / 118,310.13-177,285.63-86,741.21

Finding the Fourth Proportional to 118,310.13, 177,285.63 and 86,741.21

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Solution

The fourth proportional to 118,310.13, 177,285.63 and 86,741.21 is: 129,980.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,310.13 : 177,285.63 = 86,741.21 : x
  2. Step 2: Convert to fraction form
    118,310.13/177,285.63 = 86,741.21/x
  3. Step 3: Cross multiply
    118,310.13x = 177,285.63 × 86,741.21
  4. Step 4: Simplify right side
    118,310.13x = 15,377,970,061.81
  5. Step 5: Solve for x
    x = 15,377,970,061.81/118,310.13
  6. Step 6: Final answer
    x = 129,980.16

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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.