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Finding the Fourth Proportional to 108,464.40, 163,085.40 and 91,357.20

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Solution

The fourth proportional to 108,464.40, 163,085.40 and 91,357.20 is: 137,363.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,464.40 : 163,085.40 = 91,357.20 : x
  2. Step 2: Convert to fraction form
    108,464.40/163,085.40 = 91,357.20/x
  3. Step 3: Cross multiply
    108,464.40x = 163,085.40 × 91,357.20
  4. Step 4: Simplify right side
    108,464.40x = 14,899,025,504.88
  5. Step 5: Solve for x
    x = 14,899,025,504.88/108,464.40
  6. Step 6: Final answer
    x = 137,363.28

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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.