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Finding the Fourth Proportional to 60,965.60, 91,448.40 and 19,416.80

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Solution

The fourth proportional to 60,965.60, 91,448.40 and 19,416.80 is: 29,125.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,965.60 : 91,448.40 = 19,416.80 : x
  2. Step 2: Convert to fraction form
    60,965.60/91,448.40 = 19,416.80/x
  3. Step 3: Cross multiply
    60,965.60x = 91,448.40 × 19,416.80
  4. Step 4: Simplify right side
    60,965.60x = 1,775,635,293.12
  5. Step 5: Solve for x
    x = 1,775,635,293.12/60,965.60
  6. Step 6: Final answer
    x = 29,125.20

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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.