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Finding the Fourth Proportional to 70,170.84, 105,263.04 and 28,040.91

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Solution

The fourth proportional to 70,170.84, 105,263.04 and 28,040.91 is: 42,064.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,170.84 : 105,263.04 = 28,040.91 : x
  2. Step 2: Convert to fraction form
    70,170.84/105,263.04 = 28,040.91/x
  3. Step 3: Cross multiply
    70,170.84x = 105,263.04 × 28,040.91
  4. Step 4: Simplify right side
    70,170.84x = 2,951,671,430.97
  5. Step 5: Solve for x
    x = 2,951,671,430.97/70,170.84
  6. Step 6: Final answer
    x = 42,064.07

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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.