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Finding the Fourth Proportional to 139,565.88, 209,372.28 and 64,655.40

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Solution

The fourth proportional to 139,565.88, 209,372.28 and 64,655.40 is: 96,993.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,565.88 : 209,372.28 = 64,655.40 : x
  2. Step 2: Convert to fraction form
    139,565.88/209,372.28 = 64,655.40/x
  3. Step 3: Cross multiply
    139,565.88x = 209,372.28 × 64,655.40
  4. Step 4: Simplify right side
    139,565.88x = 13,537,048,512.31
  5. Step 5: Solve for x
    x = 13,537,048,512.31/139,565.88
  6. Step 6: Final answer
    x = 96,993.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.