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Finding the Fourth Proportional to 153,148.86, 211,347.27 and 86,079.42

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Solution

The fourth proportional to 153,148.86, 211,347.27 and 86,079.42 is: 118,790.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,148.86 : 211,347.27 = 86,079.42 : x
  2. Step 2: Convert to fraction form
    153,148.86/211,347.27 = 86,079.42/x
  3. Step 3: Cross multiply
    153,148.86x = 211,347.27 × 86,079.42
  4. Step 4: Simplify right side
    153,148.86x = 18,192,650,420.18
  5. Step 5: Solve for x
    x = 18,192,650,420.18/153,148.86
  6. Step 6: Final answer
    x = 118,790.64

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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.