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Finding the Fourth Proportional to 213,289, 294,338.82 and 123,870.76

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Solution

The fourth proportional to 213,289, 294,338.82 and 123,870.76 is: 170,941.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,289 : 294,338.82 = 123,870.76 : x
  2. Step 2: Convert to fraction form
    213,289/294,338.82 = 123,870.76/x
  3. Step 3: Cross multiply
    213,289x = 294,338.82 × 123,870.76
  4. Step 4: Simplify right side
    213,289x = 36,459,973,330.90
  5. Step 5: Solve for x
    x = 36,459,973,330.90/213,289
  6. Step 6: Final answer
    x = 170,941.65

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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.