Home / 86,646.13-129,969.21-31,242.13

Finding the Fourth Proportional to 86,646.13, 129,969.21 and 31,242.13

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Solution

The fourth proportional to 86,646.13, 129,969.21 and 31,242.13 is: 46,863.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,646.13 : 129,969.21 = 31,242.13 : x
  2. Step 2: Convert to fraction form
    86,646.13/129,969.21 = 31,242.13/x
  3. Step 3: Cross multiply
    86,646.13x = 129,969.21 × 31,242.13
  4. Step 4: Simplify right side
    86,646.13x = 4,060,514,954.82
  5. Step 5: Solve for x
    x = 4,060,514,954.82/86,646.13
  6. Step 6: Final answer
    x = 46,863.20

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Similar ratio
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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.