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Finding the Fourth Proportional to 153,045.80, 229,568.70 and 135,987.20

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Solution

The fourth proportional to 153,045.80, 229,568.70 and 135,987.20 is: 203,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,045.80 : 229,568.70 = 135,987.20 : x
  2. Step 2: Convert to fraction form
    153,045.80/229,568.70 = 135,987.20/x
  3. Step 3: Cross multiply
    153,045.80x = 229,568.70 × 135,987.20
  4. Step 4: Simplify right side
    153,045.80x = 31,218,404,720.64
  5. Step 5: Solve for x
    x = 31,218,404,720.64/153,045.80
  6. Step 6: Final answer
    x = 203,980.80

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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.