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Finding the Fourth Proportional to 70,502.22, 105,728.70 and 28,371.36

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Solution

The fourth proportional to 70,502.22, 105,728.70 and 28,371.36 is: 42,547.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,502.22 : 105,728.70 = 28,371.36 : x
  2. Step 2: Convert to fraction form
    70,502.22/105,728.70 = 28,371.36/x
  3. Step 3: Cross multiply
    70,502.22x = 105,728.70 × 28,371.36
  4. Step 4: Simplify right side
    70,502.22x = 2,999,667,010.03
  5. Step 5: Solve for x
    x = 2,999,667,010.03/70,502.22
  6. Step 6: Final answer
    x = 42,547.13

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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.