Home / 130,116.64-195,290.16-66,981.28

Finding the Fourth Proportional to 130,116.64, 195,290.16 and 66,981.28

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Solution

The fourth proportional to 130,116.64, 195,290.16 and 66,981.28 is: 100,531.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,116.64 : 195,290.16 = 66,981.28 : x
  2. Step 2: Convert to fraction form
    130,116.64/195,290.16 = 66,981.28/x
  3. Step 3: Cross multiply
    130,116.64x = 195,290.16 × 66,981.28
  4. Step 4: Simplify right side
    130,116.64x = 13,080,784,888.20
  5. Step 5: Solve for x
    x = 13,080,784,888.20/130,116.64
  6. Step 6: Final answer
    x = 100,531.22

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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.