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Finding the Fourth Proportional to 60,981.08, 91,448.88 and 20,988.88

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Solution

The fourth proportional to 60,981.08, 91,448.88 and 20,988.88 is: 31,475.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,981.08 : 91,448.88 = 20,988.88 : x
  2. Step 2: Convert to fraction form
    60,981.08/91,448.88 = 20,988.88/x
  3. Step 3: Cross multiply
    60,981.08x = 91,448.88 × 20,988.88
  4. Step 4: Simplify right side
    60,981.08x = 1,919,409,568.45
  5. Step 5: Solve for x
    x = 1,919,409,568.45/60,981.08
  6. Step 6: Final answer
    x = 31,475.49

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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.