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Finding the Fourth Proportional to 153,613.70, 211,986.42 and 89,938.80

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Solution

The fourth proportional to 153,613.70, 211,986.42 and 89,938.80 is: 124,115.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,613.70 : 211,986.42 = 89,938.80 : x
  2. Step 2: Convert to fraction form
    153,613.70/211,986.42 = 89,938.80/x
  3. Step 3: Cross multiply
    153,613.70x = 211,986.42 × 89,938.80
  4. Step 4: Simplify right side
    153,613.70x = 19,065,804,231.10
  5. Step 5: Solve for x
    x = 19,065,804,231.10/153,613.70
  6. Step 6: Final answer
    x = 124,115.26

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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.