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Finding the Fourth Proportional to 153,872.80, 230,636.40 and 65,111.20

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Solution

The fourth proportional to 153,872.80, 230,636.40 and 65,111.20 is: 97,593.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,872.80 : 230,636.40 = 65,111.20 : x
  2. Step 2: Convert to fraction form
    153,872.80/230,636.40 = 65,111.20/x
  3. Step 3: Cross multiply
    153,872.80x = 230,636.40 × 65,111.20
  4. Step 4: Simplify right side
    153,872.80x = 15,017,012,767.68
  5. Step 5: Solve for x
    x = 15,017,012,767.68/153,872.80
  6. Step 6: Final answer
    x = 97,593.68

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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.