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Finding the Fourth Proportional to 86,143.86, 118,879.92 and 52,151.94

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Solution

The fourth proportional to 86,143.86, 118,879.92 and 52,151.94 is: 71,970.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,143.86 : 118,879.92 = 52,151.94 : x
  2. Step 2: Convert to fraction form
    86,143.86/118,879.92 = 52,151.94/x
  3. Step 3: Cross multiply
    86,143.86x = 118,879.92 × 52,151.94
  4. Step 4: Simplify right side
    86,143.86x = 6,199,818,455.04
  5. Step 5: Solve for x
    x = 6,199,818,455.04/86,143.86
  6. Step 6: Final answer
    x = 71,970.52

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1.5x scale

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.