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Finding the Fourth Proportional to 75,281.82, 103,628.18 and 65,068.20

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Solution

The fourth proportional to 75,281.82, 103,628.18 and 65,068.20 is: 89,568.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,281.82 : 103,628.18 = 65,068.20 : x
  2. Step 2: Convert to fraction form
    75,281.82/103,628.18 = 65,068.20/x
  3. Step 3: Cross multiply
    75,281.82x = 103,628.18 × 65,068.20
  4. Step 4: Simplify right side
    75,281.82x = 6,742,898,816.54
  5. Step 5: Solve for x
    x = 6,742,898,816.54/75,281.82
  6. Step 6: Final answer
    x = 89,568.75

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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.