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Finding the Fourth Proportional to 72,197.94, 108,085.74 and 42,120.20

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Solution

The fourth proportional to 72,197.94, 108,085.74 and 42,120.20 is: 63,057.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,197.94 : 108,085.74 = 42,120.20 : x
  2. Step 2: Convert to fraction form
    72,197.94/108,085.74 = 42,120.20/x
  3. Step 3: Cross multiply
    72,197.94x = 108,085.74 × 42,120.20
  4. Step 4: Simplify right side
    72,197.94x = 4,552,592,985.95
  5. Step 5: Solve for x
    x = 4,552,592,985.95/72,197.94
  6. Step 6: Final answer
    x = 63,057.10

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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.