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Finding the Fourth Proportional to 86,335.66, 129,521.06 and 36,415.93

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Solution

The fourth proportional to 86,335.66, 129,521.06 and 36,415.93 is: 54,631.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,335.66 : 129,521.06 = 36,415.93 : x
  2. Step 2: Convert to fraction form
    86,335.66/129,521.06 = 36,415.93/x
  3. Step 3: Cross multiply
    86,335.66x = 129,521.06 × 36,415.93
  4. Step 4: Simplify right side
    86,335.66x = 4,716,629,854.49
  5. Step 5: Solve for x
    x = 4,716,629,854.49/86,335.66
  6. Step 6: Final answer
    x = 54,631.31

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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.