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Finding the Fourth Proportional to 65,958.79, 98,937.13 and 20,979.50

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Solution

The fourth proportional to 65,958.79, 98,937.13 and 20,979.50 is: 31,468.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,958.79 : 98,937.13 = 20,979.50 : x
  2. Step 2: Convert to fraction form
    65,958.79/98,937.13 = 20,979.50/x
  3. Step 3: Cross multiply
    65,958.79x = 98,937.13 × 20,979.50
  4. Step 4: Simplify right side
    65,958.79x = 2,075,651,518.84
  5. Step 5: Solve for x
    x = 2,075,651,518.84/65,958.79
  6. Step 6: Final answer
    x = 31,468.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.