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Finding the Fourth Proportional to 122,280.61, 168,675.57 and 76,886.65

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Solution

The fourth proportional to 122,280.61, 168,675.57 and 76,886.65 is: 106,058.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,280.61 : 168,675.57 = 76,886.65 : x
  2. Step 2: Convert to fraction form
    122,280.61/168,675.57 = 76,886.65/x
  3. Step 3: Cross multiply
    122,280.61x = 168,675.57 × 76,886.65
  4. Step 4: Simplify right side
    122,280.61x = 12,968,899,514.14
  5. Step 5: Solve for x
    x = 12,968,899,514.14/122,280.61
  6. Step 6: Final answer
    x = 106,058.51

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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.