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Finding the Fourth Proportional to 108,815.68, 150,021.28 and 71,024.32

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Solution

The fourth proportional to 108,815.68, 150,021.28 and 71,024.32 is: 97,919.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,815.68 : 150,021.28 = 71,024.32 : x
  2. Step 2: Convert to fraction form
    108,815.68/150,021.28 = 71,024.32/x
  3. Step 3: Cross multiply
    108,815.68x = 150,021.28 × 71,024.32
  4. Step 4: Simplify right side
    108,815.68x = 10,655,159,397.53
  5. Step 5: Solve for x
    x = 10,655,159,397.53/108,815.68
  6. Step 6: Final answer
    x = 97,919.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.