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Finding the Fourth Proportional to 75,047.65, 103,555.61 and 42,786.43

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Solution

The fourth proportional to 75,047.65, 103,555.61 and 42,786.43 is: 59,039.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,047.65 : 103,555.61 = 42,786.43 : x
  2. Step 2: Convert to fraction form
    75,047.65/103,555.61 = 42,786.43/x
  3. Step 3: Cross multiply
    75,047.65x = 103,555.61 × 42,786.43
  4. Step 4: Simplify right side
    75,047.65x = 4,430,774,385.55
  5. Step 5: Solve for x
    x = 4,430,774,385.55/75,047.65
  6. Step 6: Final answer
    x = 59,039.48

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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.