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Finding the Fourth Proportional to 99,615.80, 137,469.78 and 54,903.80

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Solution

The fourth proportional to 99,615.80, 137,469.78 and 54,903.80 is: 75,767.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,615.80 : 137,469.78 = 54,903.80 : x
  2. Step 2: Convert to fraction form
    99,615.80/137,469.78 = 54,903.80/x
  3. Step 3: Cross multiply
    99,615.80x = 137,469.78 × 54,903.80
  4. Step 4: Simplify right side
    99,615.80x = 7,547,613,307.16
  5. Step 5: Solve for x
    x = 7,547,613,307.16/99,615.80
  6. Step 6: Final answer
    x = 75,767.23

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1.5x scale

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.