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Finding the Fourth Proportional to 203,159.60, 280,221.50 and 139,386.68

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Solution

The fourth proportional to 203,159.60, 280,221.50 and 139,386.68 is: 192,258.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,159.60 : 280,221.50 = 139,386.68 : x
  2. Step 2: Convert to fraction form
    203,159.60/280,221.50 = 139,386.68/x
  3. Step 3: Cross multiply
    203,159.60x = 280,221.50 × 139,386.68
  4. Step 4: Simplify right side
    203,159.60x = 39,059,144,549.62
  5. Step 5: Solve for x
    x = 39,059,144,549.62/203,159.60
  6. Step 6: Final answer
    x = 192,258.42

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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.