Home / 70,276.72-105,432.36-28,159.60

Finding the Fourth Proportional to 70,276.72, 105,432.36 and 28,159.60

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Solution

The fourth proportional to 70,276.72, 105,432.36 and 28,159.60 is: 42,246.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,276.72 : 105,432.36 = 28,159.60 : x
  2. Step 2: Convert to fraction form
    70,276.72/105,432.36 = 28,159.60/x
  3. Step 3: Cross multiply
    70,276.72x = 105,432.36 × 28,159.60
  4. Step 4: Simplify right side
    70,276.72x = 2,968,933,084.66
  5. Step 5: Solve for x
    x = 2,968,933,084.66/70,276.72
  6. Step 6: Final answer
    x = 42,246.32

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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.