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Finding the Fourth Proportional to 74,979.60, 103,549.32 and 64,859.46

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Solution

The fourth proportional to 74,979.60, 103,549.32 and 64,859.46 is: 89,573.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,979.60 : 103,549.32 = 64,859.46 : x
  2. Step 2: Convert to fraction form
    74,979.60/103,549.32 = 64,859.46/x
  3. Step 3: Cross multiply
    74,979.60x = 103,549.32 × 64,859.46
  4. Step 4: Simplify right side
    74,979.60x = 6,716,152,978.57
  5. Step 5: Solve for x
    x = 6,716,152,978.57/74,979.60
  6. Step 6: Final answer
    x = 89,573.07

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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.