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Finding the Fourth Proportional to 131,870.57, 182,009.57 and 85,987.49

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Solution

The fourth proportional to 131,870.57, 182,009.57 and 85,987.49 is: 118,681.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,870.57 : 182,009.57 = 85,987.49 : x
  2. Step 2: Convert to fraction form
    131,870.57/182,009.57 = 85,987.49/x
  3. Step 3: Cross multiply
    131,870.57x = 182,009.57 × 85,987.49
  4. Step 4: Simplify right side
    131,870.57x = 15,650,544,740.29
  5. Step 5: Solve for x
    x = 15,650,544,740.29/131,870.57
  6. Step 6: Final answer
    x = 118,681.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.