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Finding the Fourth Proportional to 47,378.88, 70,988.01 and 28,619.52

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Solution

The fourth proportional to 47,378.88, 70,988.01 and 28,619.52 is: 42,880.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,378.88 : 70,988.01 = 28,619.52 : x
  2. Step 2: Convert to fraction form
    47,378.88/70,988.01 = 28,619.52/x
  3. Step 3: Cross multiply
    47,378.88x = 70,988.01 × 28,619.52
  4. Step 4: Simplify right side
    47,378.88x = 2,031,642,771.96
  5. Step 5: Solve for x
    x = 2,031,642,771.96/47,378.88
  6. Step 6: Final answer
    x = 42,880.77

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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.