Home / 98,638.86-147,959.34-28,518.78

Finding the Fourth Proportional to 98,638.86, 147,959.34 and 28,518.78

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Solution

The fourth proportional to 98,638.86, 147,959.34 and 28,518.78 is: 42,778.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,638.86 : 147,959.34 = 28,518.78 : x
  2. Step 2: Convert to fraction form
    98,638.86/147,959.34 = 28,518.78/x
  3. Step 3: Cross multiply
    98,638.86x = 147,959.34 × 28,518.78
  4. Step 4: Simplify right side
    98,638.86x = 4,219,619,866.41
  5. Step 5: Solve for x
    x = 4,219,619,866.41/98,638.86
  6. Step 6: Final answer
    x = 42,778.47

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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.