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Finding the Fourth Proportional to 153,904.80, 230,857.20 and 65,128.80

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Solution

The fourth proportional to 153,904.80, 230,857.20 and 65,128.80 is: 97,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,904.80 : 230,857.20 = 65,128.80 : x
  2. Step 2: Convert to fraction form
    153,904.80/230,857.20 = 65,128.80/x
  3. Step 3: Cross multiply
    153,904.80x = 230,857.20 × 65,128.80
  4. Step 4: Simplify right side
    153,904.80x = 15,035,452,407.36
  5. Step 5: Solve for x
    x = 15,035,452,407.36/153,904.80
  6. Step 6: Final answer
    x = 97,693.20

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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.