Home / 81,603.24-122,306.43-42,138.84

Finding the Fourth Proportional to 81,603.24, 122,306.43 and 42,138.84

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Solution

The fourth proportional to 81,603.24, 122,306.43 and 42,138.84 is: 63,157.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,603.24 : 122,306.43 = 42,138.84 : x
  2. Step 2: Convert to fraction form
    81,603.24/122,306.43 = 42,138.84/x
  3. Step 3: Cross multiply
    81,603.24x = 122,306.43 × 42,138.84
  4. Step 4: Simplify right side
    81,603.24x = 5,153,851,084.74
  5. Step 5: Solve for x
    x = 5,153,851,084.74/81,603.24
  6. Step 6: Final answer
    x = 63,157.43

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1.5x scale

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.