Home / 102,940.36-142,045.76-57,620.88

Finding the Fourth Proportional to 102,940.36, 142,045.76 and 57,620.88

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Solution

The fourth proportional to 102,940.36, 142,045.76 and 57,620.88 is: 79,510.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,940.36 : 142,045.76 = 57,620.88 : x
  2. Step 2: Convert to fraction form
    102,940.36/142,045.76 = 57,620.88/x
  3. Step 3: Cross multiply
    102,940.36x = 142,045.76 × 57,620.88
  4. Step 4: Simplify right side
    102,940.36x = 8,184,801,691.47
  5. Step 5: Solve for x
    x = 8,184,801,691.47/102,940.36
  6. Step 6: Final answer
    x = 79,510.13

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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.