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Finding the Fourth Proportional to 86,668.80, 130,039.65 and 47,254.20

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Solution

The fourth proportional to 86,668.80, 130,039.65 and 47,254.20 is: 70,901.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,668.80 : 130,039.65 = 47,254.20 : x
  2. Step 2: Convert to fraction form
    86,668.80/130,039.65 = 47,254.20/x
  3. Step 3: Cross multiply
    86,668.80x = 130,039.65 × 47,254.20
  4. Step 4: Simplify right side
    86,668.80x = 6,144,919,629.03
  5. Step 5: Solve for x
    x = 6,144,919,629.03/86,668.80
  6. Step 6: Final answer
    x = 70,901.17

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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.