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Finding the Fourth Proportional to 72,164.20, 108,246.30 and 64,647.40

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Solution

The fourth proportional to 72,164.20, 108,246.30 and 64,647.40 is: 96,971.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,164.20 : 108,246.30 = 64,647.40 : x
  2. Step 2: Convert to fraction form
    72,164.20/108,246.30 = 64,647.40/x
  3. Step 3: Cross multiply
    72,164.20x = 108,246.30 × 64,647.40
  4. Step 4: Simplify right side
    72,164.20x = 6,997,841,854.62
  5. Step 5: Solve for x
    x = 6,997,841,854.62/72,164.20
  6. Step 6: Final answer
    x = 96,971.10

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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.