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Finding the Fourth Proportional to 86,751.18, 130,135.41 and 40,017.42

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Solution

The fourth proportional to 86,751.18, 130,135.41 and 40,017.42 is: 60,030.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,751.18 : 130,135.41 = 40,017.42 : x
  2. Step 2: Convert to fraction form
    86,751.18/130,135.41 = 40,017.42/x
  3. Step 3: Cross multiply
    86,751.18x = 130,135.41 × 40,017.42
  4. Step 4: Simplify right side
    86,751.18x = 5,207,683,358.84
  5. Step 5: Solve for x
    x = 5,207,683,358.84/86,751.18
  6. Step 6: Final answer
    x = 60,030.12

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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.