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Finding the Fourth Proportional to 72,343.68, 99,731.52 and 53,189.64

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Solution

The fourth proportional to 72,343.68, 99,731.52 and 53,189.64 is: 73,326.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,343.68 : 99,731.52 = 53,189.64 : x
  2. Step 2: Convert to fraction form
    72,343.68/99,731.52 = 53,189.64/x
  3. Step 3: Cross multiply
    72,343.68x = 99,731.52 × 53,189.64
  4. Step 4: Simplify right side
    72,343.68x = 5,304,683,645.45
  5. Step 5: Solve for x
    x = 5,304,683,645.45/72,343.68
  6. Step 6: Final answer
    x = 73,326.15

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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.