Home / 86,278.95-129,456.09-30,159.33

Finding the Fourth Proportional to 86,278.95, 129,456.09 and 30,159.33

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Solution

The fourth proportional to 86,278.95, 129,456.09 and 30,159.33 is: 45,252.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,278.95 : 129,456.09 = 30,159.33 : x
  2. Step 2: Convert to fraction form
    86,278.95/129,456.09 = 30,159.33/x
  3. Step 3: Cross multiply
    86,278.95x = 129,456.09 × 30,159.33
  4. Step 4: Simplify right side
    86,278.95x = 3,904,308,938.82
  5. Step 5: Solve for x
    x = 3,904,308,938.82/86,278.95
  6. Step 6: Final answer
    x = 45,252.16

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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.