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Finding the Fourth Proportional to 74,751.19, 103,158.34 and 42,480.72

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Solution

The fourth proportional to 74,751.19, 103,158.34 and 42,480.72 is: 58,624.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,751.19 : 103,158.34 = 42,480.72 : x
  2. Step 2: Convert to fraction form
    74,751.19/103,158.34 = 42,480.72/x
  3. Step 3: Cross multiply
    74,751.19x = 103,158.34 × 42,480.72
  4. Step 4: Simplify right side
    74,751.19x = 4,382,240,689.96
  5. Step 5: Solve for x
    x = 4,382,240,689.96/74,751.19
  6. Step 6: Final answer
    x = 58,624.36

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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.