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Finding the Fourth Proportional to 74,122.00, 102,288.40 and 40,130.50

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Solution

The fourth proportional to 74,122.00, 102,288.40 and 40,130.50 is: 55,380.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,122.00 : 102,288.40 = 40,130.50 : x
  2. Step 2: Convert to fraction form
    74,122.00/102,288.40 = 40,130.50/x
  3. Step 3: Cross multiply
    74,122.00x = 102,288.40 × 40,130.50
  4. Step 4: Simplify right side
    74,122.00x = 4,104,884,409.99
  5. Step 5: Solve for x
    x = 4,104,884,409.99/74,122.00
  6. Step 6: Final answer
    x = 55,380.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.