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Finding the Fourth Proportional to 69,830.32, 104,746.60 and 66,285.76

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Solution

The fourth proportional to 69,830.32, 104,746.60 and 66,285.76 is: 99,429.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,830.32 : 104,746.60 = 66,285.76 : x
  2. Step 2: Convert to fraction form
    69,830.32/104,746.60 = 66,285.76/x
  3. Step 3: Cross multiply
    69,830.32x = 104,746.60 × 66,285.76
  4. Step 4: Simplify right side
    69,830.32x = 6,943,207,988.42
  5. Step 5: Solve for x
    x = 6,943,207,988.42/69,830.32
  6. Step 6: Final answer
    x = 99,429.70

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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.