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Finding the Fourth Proportional to 122,555.86, 169,122.72 and 74,888.98

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Solution

The fourth proportional to 122,555.86, 169,122.72 and 74,888.98 is: 103,344.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,555.86 : 169,122.72 = 74,888.98 : x
  2. Step 2: Convert to fraction form
    122,555.86/169,122.72 = 74,888.98/x
  3. Step 3: Cross multiply
    122,555.86x = 169,122.72 × 74,888.98
  4. Step 4: Simplify right side
    122,555.86x = 12,665,427,995.63
  5. Step 5: Solve for x
    x = 12,665,427,995.63/122,555.86
  6. Step 6: Final answer
    x = 103,344.12

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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.