Home / 86,318.19-129,440.16-30,141.45

Finding the Fourth Proportional to 86,318.19, 129,440.16 and 30,141.45

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Solution

The fourth proportional to 86,318.19, 129,440.16 and 30,141.45 is: 45,199.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,318.19 : 129,440.16 = 30,141.45 : x
  2. Step 2: Convert to fraction form
    86,318.19/129,440.16 = 30,141.45/x
  3. Step 3: Cross multiply
    86,318.19x = 129,440.16 × 30,141.45
  4. Step 4: Simplify right side
    86,318.19x = 3,901,514,110.63
  5. Step 5: Solve for x
    x = 3,901,514,110.63/86,318.19
  6. Step 6: Final answer
    x = 45,199.21

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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.