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Finding the Fourth Proportional to 99,442.60, 149,034.30 and 46,128.40

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Solution

The fourth proportional to 99,442.60, 149,034.30 and 46,128.40 is: 69,132.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,442.60 : 149,034.30 = 46,128.40 : x
  2. Step 2: Convert to fraction form
    99,442.60/149,034.30 = 46,128.40/x
  3. Step 3: Cross multiply
    99,442.60x = 149,034.30 × 46,128.40
  4. Step 4: Simplify right side
    99,442.60x = 6,874,713,804.12
  5. Step 5: Solve for x
    x = 6,874,713,804.12/99,442.60
  6. Step 6: Final answer
    x = 69,132.48

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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.