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Finding the Fourth Proportional to 125,809.71, 173,621.54 and 72,105.02

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Solution

The fourth proportional to 125,809.71, 173,621.54 and 72,105.02 is: 99,507.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,809.71 : 173,621.54 = 72,105.02 : x
  2. Step 2: Convert to fraction form
    125,809.71/173,621.54 = 72,105.02/x
  3. Step 3: Cross multiply
    125,809.71x = 173,621.54 × 72,105.02
  4. Step 4: Simplify right side
    125,809.71x = 12,518,984,577.37
  5. Step 5: Solve for x
    x = 12,518,984,577.37/125,809.71
  6. Step 6: Final answer
    x = 99,507.30

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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.