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Finding the Fourth Proportional to 70,123.86, 105,107.88 and 53,428.85

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Solution

The fourth proportional to 70,123.86, 105,107.88 and 53,428.85 is: 80,083.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,123.86 : 105,107.88 = 53,428.85 : x
  2. Step 2: Convert to fraction form
    70,123.86/105,107.88 = 53,428.85/x
  3. Step 3: Cross multiply
    70,123.86x = 105,107.88 × 53,428.85
  4. Step 4: Simplify right side
    70,123.86x = 5,615,793,154.34
  5. Step 5: Solve for x
    x = 5,615,793,154.34/70,123.86
  6. Step 6: Final answer
    x = 80,083.91

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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.