Home / 124,071.78-171,127.38-78,710.64

Finding the Fourth Proportional to 124,071.78, 171,127.38 and 78,710.64

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Solution

The fourth proportional to 124,071.78, 171,127.38 and 78,710.64 is: 108,562.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,071.78 : 171,127.38 = 78,710.64 : x
  2. Step 2: Convert to fraction form
    124,071.78/171,127.38 = 78,710.64/x
  3. Step 3: Cross multiply
    124,071.78x = 171,127.38 × 78,710.64
  4. Step 4: Simplify right side
    124,071.78x = 13,469,545,601.32
  5. Step 5: Solve for x
    x = 13,469,545,601.32/124,071.78
  6. Step 6: Final answer
    x = 108,562.52

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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.