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Finding the Fourth Proportional to 84,990.90, 127,431.63 and 73,148.28

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Solution

The fourth proportional to 84,990.90, 127,431.63 and 73,148.28 is: 109,675.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,990.90 : 127,431.63 = 73,148.28 : x
  2. Step 2: Convert to fraction form
    84,990.90/127,431.63 = 73,148.28/x
  3. Step 3: Cross multiply
    84,990.90x = 127,431.63 × 73,148.28
  4. Step 4: Simplify right side
    84,990.90x = 9,321,404,552.10
  5. Step 5: Solve for x
    x = 9,321,404,552.10/84,990.90
  6. Step 6: Final answer
    x = 109,675.32

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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.