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Finding the Fourth Proportional to 74,000.40, 111,008.70 and 71,667.60

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Solution

The fourth proportional to 74,000.40, 111,008.70 and 71,667.60 is: 107,509.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,000.40 : 111,008.70 = 71,667.60 : x
  2. Step 2: Convert to fraction form
    74,000.40/111,008.70 = 71,667.60/x
  3. Step 3: Cross multiply
    74,000.40x = 111,008.70 × 71,667.60
  4. Step 4: Simplify right side
    74,000.40x = 7,955,727,108.12
  5. Step 5: Solve for x
    x = 7,955,727,108.12/74,000.40
  6. Step 6: Final answer
    x = 107,509.24

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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.