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Finding the Fourth Proportional to 65,689.19, 90,624.24 and 48,502.74

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Solution

The fourth proportional to 65,689.19, 90,624.24 and 48,502.74 is: 66,913.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,689.19 : 90,624.24 = 48,502.74 : x
  2. Step 2: Convert to fraction form
    65,689.19/90,624.24 = 48,502.74/x
  3. Step 3: Cross multiply
    65,689.19x = 90,624.24 × 48,502.74
  4. Step 4: Simplify right side
    65,689.19x = 4,395,523,950.42
  5. Step 5: Solve for x
    x = 4,395,523,950.42/65,689.19
  6. Step 6: Final answer
    x = 66,913.97

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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.