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Finding the Fourth Proportional to 66,239, 99,339.06 and 19,480.76

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Solution

The fourth proportional to 66,239, 99,339.06 and 19,480.76 is: 29,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,239 : 99,339.06 = 19,480.76 : x
  2. Step 2: Convert to fraction form
    66,239/99,339.06 = 19,480.76/x
  3. Step 3: Cross multiply
    66,239x = 99,339.06 × 19,480.76
  4. Step 4: Simplify right side
    66,239x = 1,935,200,386.49
  5. Step 5: Solve for x
    x = 1,935,200,386.49/66,239
  6. Step 6: Final answer
    x = 29,215.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.