Home / 185,739.48-278,656.38-85,971.64

Finding the Fourth Proportional to 185,739.48, 278,656.38 and 85,971.64

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Solution

The fourth proportional to 185,739.48, 278,656.38 and 85,971.64 is: 128,979.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,739.48 : 278,656.38 = 85,971.64 : x
  2. Step 2: Convert to fraction form
    185,739.48/278,656.38 = 85,971.64/x
  3. Step 3: Cross multiply
    185,739.48x = 278,656.38 × 85,971.64
  4. Step 4: Simplify right side
    185,739.48x = 23,956,545,985.06
  5. Step 5: Solve for x
    x = 23,956,545,985.06/185,739.48
  6. Step 6: Final answer
    x = 128,979.29

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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.