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Finding the Fourth Proportional to 78,963.17, 108,970.71 and 43,155.38

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Solution

The fourth proportional to 78,963.17, 108,970.71 and 43,155.38 is: 59,555.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,963.17 : 108,970.71 = 43,155.38 : x
  2. Step 2: Convert to fraction form
    78,963.17/108,970.71 = 43,155.38/x
  3. Step 3: Cross multiply
    78,963.17x = 108,970.71 × 43,155.38
  4. Step 4: Simplify right side
    78,963.17x = 4,702,672,398.92
  5. Step 5: Solve for x
    x = 4,702,672,398.92/78,963.17
  6. Step 6: Final answer
    x = 59,555.26

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1.5x scale

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.