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Finding the Fourth Proportional to 243,681.12, 336,321.12 and 141,765.60

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Solution

The fourth proportional to 243,681.12, 336,321.12 and 141,765.60 is: 195,660.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,681.12 : 336,321.12 = 141,765.60 : x
  2. Step 2: Convert to fraction form
    243,681.12/336,321.12 = 141,765.60/x
  3. Step 3: Cross multiply
    243,681.12x = 336,321.12 × 141,765.60
  4. Step 4: Simplify right side
    243,681.12x = 47,678,765,369.47
  5. Step 5: Solve for x
    x = 47,678,765,369.47/243,681.12
  6. Step 6: Final answer
    x = 195,660.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.