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Finding the Fourth Proportional to 86,473.17, 128,850.15 and 77,040.72

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Solution

The fourth proportional to 86,473.17, 128,850.15 and 77,040.72 is: 114,795.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,473.17 : 128,850.15 = 77,040.72 : x
  2. Step 2: Convert to fraction form
    86,473.17/128,850.15 = 77,040.72/x
  3. Step 3: Cross multiply
    86,473.17x = 128,850.15 × 77,040.72
  4. Step 4: Simplify right side
    86,473.17x = 9,926,708,328.11
  5. Step 5: Solve for x
    x = 9,926,708,328.11/86,473.17
  6. Step 6: Final answer
    x = 114,795.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.