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Finding the Fourth Proportional to 228,165.60, 342,248.40 and 139,519.20

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Solution

The fourth proportional to 228,165.60, 342,248.40 and 139,519.20 is: 209,278.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,165.60 : 342,248.40 = 139,519.20 : x
  2. Step 2: Convert to fraction form
    228,165.60/342,248.40 = 139,519.20/x
  3. Step 3: Cross multiply
    228,165.60x = 342,248.40 × 139,519.20
  4. Step 4: Simplify right side
    228,165.60x = 47,750,222,969.28
  5. Step 5: Solve for x
    x = 47,750,222,969.28/228,165.60
  6. Step 6: Final answer
    x = 209,278.80

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1.5x scale

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.