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Finding the Fourth Proportional to 153,063.60, 210,727.08 and 120,739.20

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Solution

The fourth proportional to 153,063.60, 210,727.08 and 120,739.20 is: 166,225.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,063.60 : 210,727.08 = 120,739.20 : x
  2. Step 2: Convert to fraction form
    153,063.60/210,727.08 = 120,739.20/x
  3. Step 3: Cross multiply
    153,063.60x = 210,727.08 × 120,739.20
  4. Step 4: Simplify right side
    153,063.60x = 25,443,019,057.54
  5. Step 5: Solve for x
    x = 25,443,019,057.54/153,063.60
  6. Step 6: Final answer
    x = 166,225.14

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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.