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Finding the Fourth Proportional to 57,456.65, 79,224.80 and 40,455.46

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Solution

The fourth proportional to 57,456.65, 79,224.80 and 40,455.46 is: 55,782.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,456.65 : 79,224.80 = 40,455.46 : x
  2. Step 2: Convert to fraction form
    57,456.65/79,224.80 = 40,455.46/x
  3. Step 3: Cross multiply
    57,456.65x = 79,224.80 × 40,455.46
  4. Step 4: Simplify right side
    57,456.65x = 3,205,075,331.28
  5. Step 5: Solve for x
    x = 3,205,075,331.28/57,456.65
  6. Step 6: Final answer
    x = 55,782.50

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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.