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Finding the Fourth Proportional to 120,889.60, 181,291.20 and 42,006.40

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Solution

The fourth proportional to 120,889.60, 181,291.20 and 42,006.40 is: 62,994.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,889.60 : 181,291.20 = 42,006.40 : x
  2. Step 2: Convert to fraction form
    120,889.60/181,291.20 = 42,006.40/x
  3. Step 3: Cross multiply
    120,889.60x = 181,291.20 × 42,006.40
  4. Step 4: Simplify right side
    120,889.60x = 7,615,390,663.68
  5. Step 5: Solve for x
    x = 7,615,390,663.68/120,889.60
  6. Step 6: Final answer
    x = 62,994.59

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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.