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Finding the Fourth Proportional to 86,690.70, 130,041.71 and 26,711.82

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Solution

The fourth proportional to 86,690.70, 130,041.71 and 26,711.82 is: 40,069.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,690.70 : 130,041.71 = 26,711.82 : x
  2. Step 2: Convert to fraction form
    86,690.70/130,041.71 = 26,711.82/x
  3. Step 3: Cross multiply
    86,690.70x = 130,041.71 × 26,711.82
  4. Step 4: Simplify right side
    86,690.70x = 3,473,650,099.80
  5. Step 5: Solve for x
    x = 3,473,650,099.80/86,690.70
  6. Step 6: Final answer
    x = 40,069.47

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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.