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Finding the Fourth Proportional to 98,615.88, 147,931.38 and 28,495.80

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Solution

The fourth proportional to 98,615.88, 147,931.38 and 28,495.80 is: 42,745.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,615.88 : 147,931.38 = 28,495.80 : x
  2. Step 2: Convert to fraction form
    98,615.88/147,931.38 = 28,495.80/x
  3. Step 3: Cross multiply
    98,615.88x = 147,931.38 × 28,495.80
  4. Step 4: Simplify right side
    98,615.88x = 4,215,423,018.20
  5. Step 5: Solve for x
    x = 4,215,423,018.20/98,615.88
  6. Step 6: Final answer
    x = 42,745.88

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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.