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Finding the Fourth Proportional to 315,376.21, 473,139.65 and 105,015.97

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Solution

The fourth proportional to 315,376.21, 473,139.65 and 105,015.97 is: 157,549.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,376.21 : 473,139.65 = 105,015.97 : x
  2. Step 2: Convert to fraction form
    315,376.21/473,139.65 = 105,015.97/x
  3. Step 3: Cross multiply
    315,376.21x = 473,139.65 × 105,015.97
  4. Step 4: Simplify right side
    315,376.21x = 49,687,220,473.06
  5. Step 5: Solve for x
    x = 49,687,220,473.06/315,376.21
  6. Step 6: Final answer
    x = 157,549.04

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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.