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Finding the Fourth Proportional to 122,238.40, 168,690.72 and 74,493.76

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Solution

The fourth proportional to 122,238.40, 168,690.72 and 74,493.76 is: 102,802.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,238.40 : 168,690.72 = 74,493.76 : x
  2. Step 2: Convert to fraction form
    122,238.40/168,690.72 = 74,493.76/x
  3. Step 3: Cross multiply
    122,238.40x = 168,690.72 × 74,493.76
  4. Step 4: Simplify right side
    122,238.40x = 12,566,406,009.91
  5. Step 5: Solve for x
    x = 12,566,406,009.91/122,238.40
  6. Step 6: Final answer
    x = 102,802.44

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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.