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Finding the Fourth Proportional to 219,109.60, 302,372.76 and 138,571.84

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Solution

The fourth proportional to 219,109.60, 302,372.76 and 138,571.84 is: 191,230.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,109.60 : 302,372.76 = 138,571.84 : x
  2. Step 2: Convert to fraction form
    219,109.60/302,372.76 = 138,571.84/x
  3. Step 3: Cross multiply
    219,109.60x = 302,372.76 × 138,571.84
  4. Step 4: Simplify right side
    219,109.60x = 41,900,349,719.08
  5. Step 5: Solve for x
    x = 41,900,349,719.08/219,109.60
  6. Step 6: Final answer
    x = 191,230.10

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1.5x scale

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.