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Finding the Fourth Proportional to 65,398.53, 90,277.36 and 55,378.83

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Solution

The fourth proportional to 65,398.53, 90,277.36 and 55,378.83 is: 76,445.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,398.53 : 90,277.36 = 55,378.83 : x
  2. Step 2: Convert to fraction form
    65,398.53/90,277.36 = 55,378.83/x
  3. Step 3: Cross multiply
    65,398.53x = 90,277.36 × 55,378.83
  4. Step 4: Simplify right side
    65,398.53x = 4,999,454,433.84
  5. Step 5: Solve for x
    x = 4,999,454,433.84/65,398.53
  6. Step 6: Final answer
    x = 76,445.98

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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.