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Finding the Fourth Proportional to 63,112.80, 94,621.20 and 31,970.40

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Solution

The fourth proportional to 63,112.80, 94,621.20 and 31,970.40 is: 47,931.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,112.80 : 94,621.20 = 31,970.40 : x
  2. Step 2: Convert to fraction form
    63,112.80/94,621.20 = 31,970.40/x
  3. Step 3: Cross multiply
    63,112.80x = 94,621.20 × 31,970.40
  4. Step 4: Simplify right side
    63,112.80x = 3,025,077,612.48
  5. Step 5: Solve for x
    x = 3,025,077,612.48/63,112.80
  6. Step 6: Final answer
    x = 47,931.29

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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.