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Finding the Fourth Proportional to 71,189.36, 98,243.36 and 39,360.30

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Solution

The fourth proportional to 71,189.36, 98,243.36 and 39,360.30 is: 54,318.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,189.36 : 98,243.36 = 39,360.30 : x
  2. Step 2: Convert to fraction form
    71,189.36/98,243.36 = 39,360.30/x
  3. Step 3: Cross multiply
    71,189.36x = 98,243.36 × 39,360.30
  4. Step 4: Simplify right side
    71,189.36x = 3,866,887,925.81
  5. Step 5: Solve for x
    x = 3,866,887,925.81/71,189.36
  6. Step 6: Final answer
    x = 54,318.34

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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.