Home / 90,871.64-136,312.88-28,542.12

Finding the Fourth Proportional to 90,871.64, 136,312.88 and 28,542.12

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Solution

The fourth proportional to 90,871.64, 136,312.88 and 28,542.12 is: 42,814.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,871.64 : 136,312.88 = 28,542.12 : x
  2. Step 2: Convert to fraction form
    90,871.64/136,312.88 = 28,542.12/x
  3. Step 3: Cross multiply
    90,871.64x = 136,312.88 × 28,542.12
  4. Step 4: Simplify right side
    90,871.64x = 3,890,658,578.51
  5. Step 5: Solve for x
    x = 3,890,658,578.51/90,871.64
  6. Step 6: Final answer
    x = 42,814.88

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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.