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Finding the Fourth Proportional to 57,203.81, 78,894.45 and 40,264.13

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Solution

The fourth proportional to 57,203.81, 78,894.45 and 40,264.13 is: 55,531.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,203.81 : 78,894.45 = 40,264.13 : x
  2. Step 2: Convert to fraction form
    57,203.81/78,894.45 = 40,264.13/x
  3. Step 3: Cross multiply
    57,203.81x = 78,894.45 × 40,264.13
  4. Step 4: Simplify right side
    57,203.81x = 3,176,615,996.61
  5. Step 5: Solve for x
    x = 3,176,615,996.61/57,203.81
  6. Step 6: Final answer
    x = 55,531.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.