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Finding the Fourth Proportional to 122,779.76, 169,417.46 and 69,077.97

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Solution

The fourth proportional to 122,779.76, 169,417.46 and 69,077.97 is: 95,317.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,779.76 : 169,417.46 = 69,077.97 : x
  2. Step 2: Convert to fraction form
    122,779.76/169,417.46 = 69,077.97/x
  3. Step 3: Cross multiply
    122,779.76x = 169,417.46 × 69,077.97
  4. Step 4: Simplify right side
    122,779.76x = 11,703,014,392.05
  5. Step 5: Solve for x
    x = 11,703,014,392.05/122,779.76
  6. Step 6: Final answer
    x = 95,317.13

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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.