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Finding the Fourth Proportional to 89,780.40, 134,816.40 and 60,328.80

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Solution

The fourth proportional to 89,780.40, 134,816.40 and 60,328.80 is: 90,591.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,780.40 : 134,816.40 = 60,328.80 : x
  2. Step 2: Convert to fraction form
    89,780.40/134,816.40 = 60,328.80/x
  3. Step 3: Cross multiply
    89,780.40x = 134,816.40 × 60,328.80
  4. Step 4: Simplify right side
    89,780.40x = 8,133,311,632.32
  5. Step 5: Solve for x
    x = 8,133,311,632.32/89,780.40
  6. Step 6: Final answer
    x = 90,591.17

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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.