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Finding the Fourth Proportional to 57,555.80, 79,439.25 and 38,681.99

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Solution

The fourth proportional to 57,555.80, 79,439.25 and 38,681.99 is: 53,389.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,555.80 : 79,439.25 = 38,681.99 : x
  2. Step 2: Convert to fraction form
    57,555.80/79,439.25 = 38,681.99/x
  3. Step 3: Cross multiply
    57,555.80x = 79,439.25 × 38,681.99
  4. Step 4: Simplify right side
    57,555.80x = 3,072,868,274.11
  5. Step 5: Solve for x
    x = 3,072,868,274.11/57,555.80
  6. Step 6: Final answer
    x = 53,389.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.