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Finding the Fourth Proportional to 111,425.49, 153,779.85 and 77,424.93

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Solution

The fourth proportional to 111,425.49, 153,779.85 and 77,424.93 is: 106,855.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,425.49 : 153,779.85 = 77,424.93 : x
  2. Step 2: Convert to fraction form
    111,425.49/153,779.85 = 77,424.93/x
  3. Step 3: Cross multiply
    111,425.49x = 153,779.85 × 77,424.93
  4. Step 4: Simplify right side
    111,425.49x = 11,906,394,121.66
  5. Step 5: Solve for x
    x = 11,906,394,121.66/111,425.49
  6. Step 6: Final answer
    x = 106,855.21

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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.