Home / 76,115.88-105,045.16-42,125.78

Finding the Fourth Proportional to 76,115.88, 105,045.16 and 42,125.78

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Solution

The fourth proportional to 76,115.88, 105,045.16 and 42,125.78 is: 58,136.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,115.88 : 105,045.16 = 42,125.78 : x
  2. Step 2: Convert to fraction form
    76,115.88/105,045.16 = 42,125.78/x
  3. Step 3: Cross multiply
    76,115.88x = 105,045.16 × 42,125.78
  4. Step 4: Simplify right side
    76,115.88x = 4,425,109,300.22
  5. Step 5: Solve for x
    x = 4,425,109,300.22/76,115.88
  6. Step 6: Final answer
    x = 58,136.48

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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.