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Finding the Fourth Proportional to 72,259.52, 108,400.53 and 42,698.66

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Solution

The fourth proportional to 72,259.52, 108,400.53 and 42,698.66 is: 64,054.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,259.52 : 108,400.53 = 42,698.66 : x
  2. Step 2: Convert to fraction form
    72,259.52/108,400.53 = 42,698.66/x
  3. Step 3: Cross multiply
    72,259.52x = 108,400.53 × 42,698.66
  4. Step 4: Simplify right side
    72,259.52x = 4,628,557,374.29
  5. Step 5: Solve for x
    x = 4,628,557,374.29/72,259.52
  6. Step 6: Final answer
    x = 64,054.64

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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.