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Finding the Fourth Proportional to 315,376.72, 473,140.40 and 105,016.48

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Solution

The fourth proportional to 315,376.72, 473,140.40 and 105,016.48 is: 157,549.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,376.72 : 473,140.40 = 105,016.48 : x
  2. Step 2: Convert to fraction form
    315,376.72/473,140.40 = 105,016.48/x
  3. Step 3: Cross multiply
    315,376.72x = 473,140.40 × 105,016.48
  4. Step 4: Simplify right side
    315,376.72x = 49,687,536,988.09
  5. Step 5: Solve for x
    x = 49,687,536,988.09/315,376.72
  6. Step 6: Final answer
    x = 157,549.80

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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.