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Finding the Fourth Proportional to 86,661.80, 130,006.46 and 36,742.12

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Solution

The fourth proportional to 86,661.80, 130,006.46 and 36,742.12 is: 55,119.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,661.80 : 130,006.46 = 36,742.12 : x
  2. Step 2: Convert to fraction form
    86,661.80/130,006.46 = 36,742.12/x
  3. Step 3: Cross multiply
    86,661.80x = 130,006.46 × 36,742.12
  4. Step 4: Simplify right side
    86,661.80x = 4,776,712,954.10
  5. Step 5: Solve for x
    x = 4,776,712,954.10/86,661.80
  6. Step 6: Final answer
    x = 55,119.01

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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.