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Finding the Fourth Proportional to 107,807.72, 161,728.86 and 45,487.40

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Solution

The fourth proportional to 107,807.72, 161,728.86 and 45,487.40 is: 68,238.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,807.72 : 161,728.86 = 45,487.40 : x
  2. Step 2: Convert to fraction form
    107,807.72/161,728.86 = 45,487.40/x
  3. Step 3: Cross multiply
    107,807.72x = 161,728.86 × 45,487.40
  4. Step 4: Simplify right side
    107,807.72x = 7,356,625,346.36
  5. Step 5: Solve for x
    x = 7,356,625,346.36/107,807.72
  6. Step 6: Final answer
    x = 68,238.39

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1.5x scale

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.