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Finding the Fourth Proportional to 60,986.70, 91,480.05 and 21,547.80

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Solution

The fourth proportional to 60,986.70, 91,480.05 and 21,547.80 is: 32,321.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,986.70 : 91,480.05 = 21,547.80 : x
  2. Step 2: Convert to fraction form
    60,986.70/91,480.05 = 21,547.80/x
  3. Step 3: Cross multiply
    60,986.70x = 91,480.05 × 21,547.80
  4. Step 4: Simplify right side
    60,986.70x = 1,971,193,821.39
  5. Step 5: Solve for x
    x = 1,971,193,821.39/60,986.70
  6. Step 6: Final answer
    x = 32,321.70

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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.