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Finding the Fourth Proportional to 65,285.88, 90,087.36 and 38,436.84

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Solution

The fourth proportional to 65,285.88, 90,087.36 and 38,436.84 is: 53,038.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,285.88 : 90,087.36 = 38,436.84 : x
  2. Step 2: Convert to fraction form
    65,285.88/90,087.36 = 38,436.84/x
  3. Step 3: Cross multiply
    65,285.88x = 90,087.36 × 38,436.84
  4. Step 4: Simplify right side
    65,285.88x = 3,462,673,442.34
  5. Step 5: Solve for x
    x = 3,462,673,442.34/65,285.88
  6. Step 6: Final answer
    x = 53,038.63

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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.