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Finding the Fourth Proportional to 65,620.94, 90,600.48 and 50,486.90

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Solution

The fourth proportional to 65,620.94, 90,600.48 and 50,486.90 is: 69,705.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,620.94 : 90,600.48 = 50,486.90 : x
  2. Step 2: Convert to fraction form
    65,620.94/90,600.48 = 50,486.90/x
  3. Step 3: Cross multiply
    65,620.94x = 90,600.48 × 50,486.90
  4. Step 4: Simplify right side
    65,620.94x = 4,574,137,373.71
  5. Step 5: Solve for x
    x = 4,574,137,373.71/65,620.94
  6. Step 6: Final answer
    x = 69,705.45

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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.