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Finding the Fourth Proportional to 140,798.48, 210,925.55 and 78,279.44

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Solution

The fourth proportional to 140,798.48, 210,925.55 and 78,279.44 is: 117,267.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,798.48 : 210,925.55 = 78,279.44 : x
  2. Step 2: Convert to fraction form
    140,798.48/210,925.55 = 78,279.44/x
  3. Step 3: Cross multiply
    140,798.48x = 210,925.55 × 78,279.44
  4. Step 4: Simplify right side
    140,798.48x = 16,511,133,076.76
  5. Step 5: Solve for x
    x = 16,511,133,076.76/140,798.48
  6. Step 6: Final answer
    x = 117,267.84

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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.