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Finding the Fourth Proportional to 75,369.40, 103,748.76 and 65,155.72

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Solution

The fourth proportional to 75,369.40, 103,748.76 and 65,155.72 is: 89,689.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,369.40 : 103,748.76 = 65,155.72 : x
  2. Step 2: Convert to fraction form
    75,369.40/103,748.76 = 65,155.72/x
  3. Step 3: Cross multiply
    75,369.40x = 103,748.76 × 65,155.72
  4. Step 4: Simplify right side
    75,369.40x = 6,759,825,156.91
  5. Step 5: Solve for x
    x = 6,759,825,156.91/75,369.40
  6. Step 6: Final answer
    x = 89,689.25

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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.