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Finding the Fourth Proportional to 219,494.28, 302,862.12 and 128,854.08

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Solution

The fourth proportional to 219,494.28, 302,862.12 and 128,854.08 is: 177,795.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,494.28 : 302,862.12 = 128,854.08 : x
  2. Step 2: Convert to fraction form
    219,494.28/302,862.12 = 128,854.08/x
  3. Step 3: Cross multiply
    219,494.28x = 302,862.12 × 128,854.08
  4. Step 4: Simplify right side
    219,494.28x = 39,025,019,839.45
  5. Step 5: Solve for x
    x = 39,025,019,839.45/219,494.28
  6. Step 6: Final answer
    x = 177,795.16

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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.