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Finding the Fourth Proportional to 191,254.86, 286,619.85 and 121,008.42

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Solution

The fourth proportional to 191,254.86, 286,619.85 and 121,008.42 is: 181,346.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,254.86 : 286,619.85 = 121,008.42 : x
  2. Step 2: Convert to fraction form
    191,254.86/286,619.85 = 121,008.42/x
  3. Step 3: Cross multiply
    191,254.86x = 286,619.85 × 121,008.42
  4. Step 4: Simplify right side
    191,254.86x = 34,683,415,189.14
  5. Step 5: Solve for x
    x = 34,683,415,189.14/191,254.86
  6. Step 6: Final answer
    x = 181,346.58

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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.