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Finding the Fourth Proportional to 72,959.43, 109,406.34 and 70,663.08

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Solution

The fourth proportional to 72,959.43, 109,406.34 and 70,663.08 is: 105,962.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,959.43 : 109,406.34 = 70,663.08 : x
  2. Step 2: Convert to fraction form
    72,959.43/109,406.34 = 70,663.08/x
  3. Step 3: Cross multiply
    72,959.43x = 109,406.34 × 70,663.08
  4. Step 4: Simplify right side
    72,959.43x = 7,730,988,955.93
  5. Step 5: Solve for x
    x = 7,730,988,955.93/72,959.43
  6. Step 6: Final answer
    x = 105,962.85

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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.