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Finding the Fourth Proportional to 100,833.96, 139,113.54 and 100,678.44

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Solution

The fourth proportional to 100,833.96, 139,113.54 and 100,678.44 is: 138,898.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,833.96 : 139,113.54 = 100,678.44 : x
  2. Step 2: Convert to fraction form
    100,833.96/139,113.54 = 100,678.44/x
  3. Step 3: Cross multiply
    100,833.96x = 139,113.54 × 100,678.44
  4. Step 4: Simplify right side
    100,833.96x = 14,005,734,190.08
  5. Step 5: Solve for x
    x = 14,005,734,190.08/100,833.96
  6. Step 6: Final answer
    x = 138,898.98

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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.