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Finding the Fourth Proportional to 65,284.61, 90,143.55 and 50,153.40

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Solution

The fourth proportional to 65,284.61, 90,143.55 and 50,153.40 is: 69,250.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,284.61 : 90,143.55 = 50,153.40 : x
  2. Step 2: Convert to fraction form
    65,284.61/90,143.55 = 50,153.40/x
  3. Step 3: Cross multiply
    65,284.61x = 90,143.55 × 50,153.40
  4. Step 4: Simplify right side
    65,284.61x = 4,521,005,520.57
  5. Step 5: Solve for x
    x = 4,521,005,520.57/65,284.61
  6. Step 6: Final answer
    x = 69,250.71

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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.