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Finding the Fourth Proportional to 70,268.40, 96,979.68 and 40,064.64

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Solution

The fourth proportional to 70,268.40, 96,979.68 and 40,064.64 is: 55,294.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,268.40 : 96,979.68 = 40,064.64 : x
  2. Step 2: Convert to fraction form
    70,268.40/96,979.68 = 40,064.64/x
  3. Step 3: Cross multiply
    70,268.40x = 96,979.68 × 40,064.64
  4. Step 4: Simplify right side
    70,268.40x = 3,885,455,966.52
  5. Step 5: Solve for x
    x = 3,885,455,966.52/70,268.40
  6. Step 6: Final answer
    x = 55,294.50

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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.