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Finding the Fourth Proportional to 86,528, 129,857.28 and 44,971.52

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Solution

The fourth proportional to 86,528, 129,857.28 and 44,971.52 is: 67,491.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,528 : 129,857.28 = 44,971.52 : x
  2. Step 2: Convert to fraction form
    86,528/129,857.28 = 44,971.52/x
  3. Step 3: Cross multiply
    86,528x = 129,857.28 × 44,971.52
  4. Step 4: Simplify right side
    86,528x = 5,839,879,264.67
  5. Step 5: Solve for x
    x = 5,839,879,264.67/86,528
  6. Step 6: Final answer
    x = 67,491.21

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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.