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Finding the Fourth Proportional to 65,356.20, 89,970.48 and 58,639.68

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Solution

The fourth proportional to 65,356.20, 89,970.48 and 58,639.68 is: 80,724.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,356.20 : 89,970.48 = 58,639.68 : x
  2. Step 2: Convert to fraction form
    65,356.20/89,970.48 = 58,639.68/x
  3. Step 3: Cross multiply
    65,356.20x = 89,970.48 × 58,639.68
  4. Step 4: Simplify right side
    65,356.20x = 5,275,840,156.65
  5. Step 5: Solve for x
    x = 5,275,840,156.65/65,356.20
  6. Step 6: Final answer
    x = 80,724.40

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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.