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Finding the Fourth Proportional to 228,991.23, 316,000.40 and 138,331.37

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Solution

The fourth proportional to 228,991.23, 316,000.40 and 138,331.37 is: 190,892.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,991.23 : 316,000.40 = 138,331.37 : x
  2. Step 2: Convert to fraction form
    228,991.23/316,000.40 = 138,331.37/x
  3. Step 3: Cross multiply
    228,991.23x = 316,000.40 × 138,331.37
  4. Step 4: Simplify right side
    228,991.23x = 43,712,768,350.89
  5. Step 5: Solve for x
    x = 43,712,768,350.89/228,991.23
  6. Step 6: Final answer
    x = 190,892.76

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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.