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Finding the Fourth Proportional to 108,141.90, 149,189.76 and 67,828.20

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Solution

The fourth proportional to 108,141.90, 149,189.76 and 67,828.20 is: 93,574.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,141.90 : 149,189.76 = 67,828.20 : x
  2. Step 2: Convert to fraction form
    108,141.90/149,189.76 = 67,828.20/x
  3. Step 3: Cross multiply
    108,141.90x = 149,189.76 × 67,828.20
  4. Step 4: Simplify right side
    108,141.90x = 10,119,272,879.23
  5. Step 5: Solve for x
    x = 10,119,272,879.23/108,141.90
  6. Step 6: Final answer
    x = 93,574.03

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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.