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Finding the Fourth Proportional to 70,238.84, 105,253.87 and 42,125.97

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Solution

The fourth proportional to 70,238.84, 105,253.87 and 42,125.97 is: 63,126.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,238.84 : 105,253.87 = 42,125.97 : x
  2. Step 2: Convert to fraction form
    70,238.84/105,253.87 = 42,125.97/x
  3. Step 3: Cross multiply
    70,238.84x = 105,253.87 × 42,125.97
  4. Step 4: Simplify right side
    70,238.84x = 4,433,921,370.00
  5. Step 5: Solve for x
    x = 4,433,921,370.00/70,238.84
  6. Step 6: Final answer
    x = 63,126.35

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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.