Home / 219,581.76-302,911.20-138,873.36

Finding the Fourth Proportional to 219,581.76, 302,911.20 and 138,873.36

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Solution

The fourth proportional to 219,581.76, 302,911.20 and 138,873.36 is: 191,574.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,581.76 : 302,911.20 = 138,873.36 : x
  2. Step 2: Convert to fraction form
    219,581.76/302,911.20 = 138,873.36/x
  3. Step 3: Cross multiply
    219,581.76x = 302,911.20 × 138,873.36
  4. Step 4: Simplify right side
    219,581.76x = 42,066,296,125.63
  5. Step 5: Solve for x
    x = 42,066,296,125.63/219,581.76
  6. Step 6: Final answer
    x = 191,574.64

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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.