Home / 213,621.57-320,502.51-87,368.01

Finding the Fourth Proportional to 213,621.57, 320,502.51 and 87,368.01

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Solution

The fourth proportional to 213,621.57, 320,502.51 and 87,368.01 is: 131,080.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,621.57 : 320,502.51 = 87,368.01 : x
  2. Step 2: Convert to fraction form
    213,621.57/320,502.51 = 87,368.01/x
  3. Step 3: Cross multiply
    213,621.57x = 320,502.51 × 87,368.01
  4. Step 4: Simplify right side
    213,621.57x = 28,001,666,498.71
  5. Step 5: Solve for x
    x = 28,001,666,498.71/213,621.57
  6. Step 6: Final answer
    x = 131,080.71

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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.