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Finding the Fourth Proportional to 91,641.60, 126,477.12 and 53,919.36

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Solution

The fourth proportional to 91,641.60, 126,477.12 and 53,919.36 is: 74,415.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,641.60 : 126,477.12 = 53,919.36 : x
  2. Step 2: Convert to fraction form
    91,641.60/126,477.12 = 53,919.36/x
  3. Step 3: Cross multiply
    91,641.60x = 126,477.12 × 53,919.36
  4. Step 4: Simplify right side
    91,641.60x = 6,819,565,365.04
  5. Step 5: Solve for x
    x = 6,819,565,365.04/91,641.60
  6. Step 6: Final answer
    x = 74,415.61

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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.