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Finding the Fourth Proportional to 100,905.61, 139,249.72 and 58,488.74

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Solution

The fourth proportional to 100,905.61, 139,249.72 and 58,488.74 is: 80,714.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,905.61 : 139,249.72 = 58,488.74 : x
  2. Step 2: Convert to fraction form
    100,905.61/139,249.72 = 58,488.74/x
  3. Step 3: Cross multiply
    100,905.61x = 139,249.72 × 58,488.74
  4. Step 4: Simplify right side
    100,905.61x = 8,144,540,668.15
  5. Step 5: Solve for x
    x = 8,144,540,668.15/100,905.61
  6. Step 6: Final answer
    x = 80,714.45

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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.