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Finding the Fourth Proportional to 78,634.98, 108,520.81 and 59,219.12

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Solution

The fourth proportional to 78,634.98, 108,520.81 and 59,219.12 is: 81,725.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,634.98 : 108,520.81 = 59,219.12 : x
  2. Step 2: Convert to fraction form
    78,634.98/108,520.81 = 59,219.12/x
  3. Step 3: Cross multiply
    78,634.98x = 108,520.81 × 59,219.12
  4. Step 4: Simplify right side
    78,634.98x = 6,426,506,993.14
  5. Step 5: Solve for x
    x = 6,426,506,993.14/78,634.98
  6. Step 6: Final answer
    x = 81,725.80

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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.