Home / 84,210.36-126,328.50-28,031.20

Finding the Fourth Proportional to 84,210.36, 126,328.50 and 28,031.20

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Solution

The fourth proportional to 84,210.36, 126,328.50 and 28,031.20 is: 42,051.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,210.36 : 126,328.50 = 28,031.20 : x
  2. Step 2: Convert to fraction form
    84,210.36/126,328.50 = 28,031.20/x
  3. Step 3: Cross multiply
    84,210.36x = 126,328.50 × 28,031.20
  4. Step 4: Simplify right side
    84,210.36x = 3,541,139,449.20
  5. Step 5: Solve for x
    x = 3,541,139,449.20/84,210.36
  6. Step 6: Final answer
    x = 42,051.11

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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.