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Finding the Fourth Proportional to 145,561.89, 218,340.78 and 45,728.07

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Solution

The fourth proportional to 145,561.89, 218,340.78 and 45,728.07 is: 68,591.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,561.89 : 218,340.78 = 45,728.07 : x
  2. Step 2: Convert to fraction form
    145,561.89/218,340.78 = 45,728.07/x
  3. Step 3: Cross multiply
    145,561.89x = 218,340.78 × 45,728.07
  4. Step 4: Simplify right side
    145,561.89x = 9,984,302,471.69
  5. Step 5: Solve for x
    x = 9,984,302,471.69/145,561.89
  6. Step 6: Final answer
    x = 68,591.46

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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.