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Finding the Fourth Proportional to 144,709.60, 217,064.40 and 138,565.60

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Solution

The fourth proportional to 144,709.60, 217,064.40 and 138,565.60 is: 207,848.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,709.60 : 217,064.40 = 138,565.60 : x
  2. Step 2: Convert to fraction form
    144,709.60/217,064.40 = 138,565.60/x
  3. Step 3: Cross multiply
    144,709.60x = 217,064.40 × 138,565.60
  4. Step 4: Simplify right side
    144,709.60x = 30,077,658,824.64
  5. Step 5: Solve for x
    x = 30,077,658,824.64/144,709.60
  6. Step 6: Final answer
    x = 207,848.40

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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.