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Finding the Fourth Proportional to 115,855.40, 159,882.88 and 65,554.40

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Solution

The fourth proportional to 115,855.40, 159,882.88 and 65,554.40 is: 90,466.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,855.40 : 159,882.88 = 65,554.40 : x
  2. Step 2: Convert to fraction form
    115,855.40/159,882.88 = 65,554.40/x
  3. Step 3: Cross multiply
    115,855.40x = 159,882.88 × 65,554.40
  4. Step 4: Simplify right side
    115,855.40x = 10,481,026,268.67
  5. Step 5: Solve for x
    x = 10,481,026,268.67/115,855.40
  6. Step 6: Final answer
    x = 90,466.45

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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.