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Finding the Fourth Proportional to 108,647.20, 163,066.80 and 64,218.40

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Solution

The fourth proportional to 108,647.20, 163,066.80 and 64,218.40 is: 96,384.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,647.20 : 163,066.80 = 64,218.40 : x
  2. Step 2: Convert to fraction form
    108,647.20/163,066.80 = 64,218.40/x
  3. Step 3: Cross multiply
    108,647.20x = 163,066.80 × 64,218.40
  4. Step 4: Simplify right side
    108,647.20x = 10,471,888,989.12
  5. Step 5: Solve for x
    x = 10,471,888,989.12/108,647.20
  6. Step 6: Final answer
    x = 96,384.34

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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.