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Finding the Fourth Proportional to 321,123.90, 481,572.45 and 110,712.90

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Solution

The fourth proportional to 321,123.90, 481,572.45 and 110,712.90 is: 166,030.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,123.90 : 481,572.45 = 110,712.90 : x
  2. Step 2: Convert to fraction form
    321,123.90/481,572.45 = 110,712.90/x
  3. Step 3: Cross multiply
    321,123.90x = 481,572.45 × 110,712.90
  4. Step 4: Simplify right side
    321,123.90x = 53,316,282,499.61
  5. Step 5: Solve for x
    x = 53,316,282,499.61/321,123.90
  6. Step 6: Final answer
    x = 166,030.25

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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.