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Finding the Fourth Proportional to 145,619.40, 218,436.30 and 75,635.40

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Solution

The fourth proportional to 145,619.40, 218,436.30 and 75,635.40 is: 113,456.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,619.40 : 218,436.30 = 75,635.40 : x
  2. Step 2: Convert to fraction form
    145,619.40/218,436.30 = 75,635.40/x
  3. Step 3: Cross multiply
    145,619.40x = 218,436.30 × 75,635.40
  4. Step 4: Simplify right side
    145,619.40x = 16,521,516,925.02
  5. Step 5: Solve for x
    x = 16,521,516,925.02/145,619.40
  6. Step 6: Final answer
    x = 113,456.84

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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.