Home / 70,243.10-105,405.65-28,143.35

Finding the Fourth Proportional to 70,243.10, 105,405.65 and 28,143.35

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Solution

The fourth proportional to 70,243.10, 105,405.65 and 28,143.35 is: 42,231.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,243.10 : 105,405.65 = 28,143.35 : x
  2. Step 2: Convert to fraction form
    70,243.10/105,405.65 = 28,143.35/x
  3. Step 3: Cross multiply
    70,243.10x = 105,405.65 × 28,143.35
  4. Step 4: Simplify right side
    70,243.10x = 2,966,468,091.30
  5. Step 5: Solve for x
    x = 2,966,468,091.30/70,243.10
  6. Step 6: Final answer
    x = 42,231.45

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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.