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Finding the Fourth Proportional to 111,549, 153,938.70 and 61,249.08

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Solution

The fourth proportional to 111,549, 153,938.70 and 61,249.08 is: 84,524.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,549 : 153,938.70 = 61,249.08 : x
  2. Step 2: Convert to fraction form
    111,549/153,938.70 = 61,249.08/x
  3. Step 3: Cross multiply
    111,549x = 153,938.70 × 61,249.08
  4. Step 4: Simplify right side
    111,549x = 9,428,603,751.40
  5. Step 5: Solve for x
    x = 9,428,603,751.40/111,549
  6. Step 6: Final answer
    x = 84,524.32

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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.