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Finding the Fourth Proportional to 128,219.73, 176,950 and 77,248.51

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Solution

The fourth proportional to 128,219.73, 176,950 and 77,248.51 is: 106,607.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,219.73 : 176,950 = 77,248.51 : x
  2. Step 2: Convert to fraction form
    128,219.73/176,950 = 77,248.51/x
  3. Step 3: Cross multiply
    128,219.73x = 176,950 × 77,248.51
  4. Step 4: Simplify right side
    128,219.73x = 13,669,123,844.50
  5. Step 5: Solve for x
    x = 13,669,123,844.50/128,219.73
  6. Step 6: Final answer
    x = 106,607.02

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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.