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Finding the Fourth Proportional to 108,689.40, 163,034.10 and 70,635.60

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Solution

The fourth proportional to 108,689.40, 163,034.10 and 70,635.60 is: 105,953.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,689.40 : 163,034.10 = 70,635.60 : x
  2. Step 2: Convert to fraction form
    108,689.40/163,034.10 = 70,635.60/x
  3. Step 3: Cross multiply
    108,689.40x = 163,034.10 × 70,635.60
  4. Step 4: Simplify right side
    108,689.40x = 11,516,011,473.96
  5. Step 5: Solve for x
    x = 11,516,011,473.96/108,689.40
  6. Step 6: Final answer
    x = 105,953.40

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1.5x scale

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.