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Finding the Fourth Proportional to 78,156.73, 107,844.10 and 46,320.49

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Solution

The fourth proportional to 78,156.73, 107,844.10 and 46,320.49 is: 63,915.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,156.73 : 107,844.10 = 46,320.49 : x
  2. Step 2: Convert to fraction form
    78,156.73/107,844.10 = 46,320.49/x
  3. Step 3: Cross multiply
    78,156.73x = 107,844.10 × 46,320.49
  4. Step 4: Simplify right side
    78,156.73x = 4,995,391,555.61
  5. Step 5: Solve for x
    x = 4,995,391,555.61/78,156.73
  6. Step 6: Final answer
    x = 63,915.05

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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.