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Finding the Fourth Proportional to 70,205.10, 105,308.10 and 28,088.70

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Solution

The fourth proportional to 70,205.10, 105,308.10 and 28,088.70 is: 42,133.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,205.10 : 105,308.10 = 28,088.70 : x
  2. Step 2: Convert to fraction form
    70,205.10/105,308.10 = 28,088.70/x
  3. Step 3: Cross multiply
    70,205.10x = 105,308.10 × 28,088.70
  4. Step 4: Simplify right side
    70,205.10x = 2,957,967,628.47
  5. Step 5: Solve for x
    x = 2,957,967,628.47/70,205.10
  6. Step 6: Final answer
    x = 42,133.23

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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.