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Finding the Fourth Proportional to 123,720.79, 185,674.48 and 90,526.49

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Solution

The fourth proportional to 123,720.79, 185,674.48 and 90,526.49 is: 135,858.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,720.79 : 185,674.48 = 90,526.49 : x
  2. Step 2: Convert to fraction form
    123,720.79/185,674.48 = 90,526.49/x
  3. Step 3: Cross multiply
    123,720.79x = 185,674.48 × 90,526.49
  4. Step 4: Simplify right side
    123,720.79x = 16,808,458,956.98
  5. Step 5: Solve for x
    x = 16,808,458,956.98/123,720.79
  6. Step 6: Final answer
    x = 135,858.00

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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.