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Finding the Fourth Proportional to 153,298.86, 211,552.43 and 86,230.86

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Solution

The fourth proportional to 153,298.86, 211,552.43 and 86,230.86 is: 118,998.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,298.86 : 211,552.43 = 86,230.86 : x
  2. Step 2: Convert to fraction form
    153,298.86/211,552.43 = 86,230.86/x
  3. Step 3: Cross multiply
    153,298.86x = 211,552.43 × 86,230.86
  4. Step 4: Simplify right side
    153,298.86x = 18,242,347,973.99
  5. Step 5: Solve for x
    x = 18,242,347,973.99/153,298.86
  6. Step 6: Final answer
    x = 118,998.59

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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.