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Finding the Fourth Proportional to 86,019.68, 129,059.84 and 26,870.24

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Solution

The fourth proportional to 86,019.68, 129,059.84 and 26,870.24 is: 40,314.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,019.68 : 129,059.84 = 26,870.24 : x
  2. Step 2: Convert to fraction form
    86,019.68/129,059.84 = 26,870.24/x
  3. Step 3: Cross multiply
    86,019.68x = 129,059.84 × 26,870.24
  4. Step 4: Simplify right side
    86,019.68x = 3,467,868,875.16
  5. Step 5: Solve for x
    x = 3,467,868,875.16/86,019.68
  6. Step 6: Final answer
    x = 40,314.83

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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.