Home / 90,871.18-136,328.70-28,541.68

Finding the Fourth Proportional to 90,871.18, 136,328.70 and 28,541.68

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Solution

The fourth proportional to 90,871.18, 136,328.70 and 28,541.68 is: 42,819.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,871.18 : 136,328.70 = 28,541.68 : x
  2. Step 2: Convert to fraction form
    90,871.18/136,328.70 = 28,541.68/x
  3. Step 3: Cross multiply
    90,871.18x = 136,328.70 × 28,541.68
  4. Step 4: Simplify right side
    90,871.18x = 3,891,050,130.22
  5. Step 5: Solve for x
    x = 3,891,050,130.22/90,871.18
  6. Step 6: Final answer
    x = 42,819.41

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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.