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Finding the Fourth Proportional to 65,624.80, 98,433.76 and 18,875.84

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Solution

The fourth proportional to 65,624.80, 98,433.76 and 18,875.84 is: 28,312.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,624.80 : 98,433.76 = 18,875.84 : x
  2. Step 2: Convert to fraction form
    65,624.80/98,433.76 = 18,875.84/x
  3. Step 3: Cross multiply
    65,624.80x = 98,433.76 × 18,875.84
  4. Step 4: Simplify right side
    65,624.80x = 1,858,019,904.36
  5. Step 5: Solve for x
    x = 1,858,019,904.36/65,624.80
  6. Step 6: Final answer
    x = 28,312.77

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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.