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Finding the Fourth Proportional to 78,963.15, 118,464.18 and 55,635.15

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Solution

The fourth proportional to 78,963.15, 118,464.18 and 55,635.15 is: 83,466.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,963.15 : 118,464.18 = 55,635.15 : x
  2. Step 2: Convert to fraction form
    78,963.15/118,464.18 = 55,635.15/x
  3. Step 3: Cross multiply
    78,963.15x = 118,464.18 × 55,635.15
  4. Step 4: Simplify right side
    78,963.15x = 6,590,772,423.93
  5. Step 5: Solve for x
    x = 6,590,772,423.93/78,963.15
  6. Step 6: Final answer
    x = 83,466.43

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1.5x scale

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.