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Finding the Fourth Proportional to 118,707.60, 163,927.50 and 76,339.68

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Solution

The fourth proportional to 118,707.60, 163,927.50 and 76,339.68 is: 105,420.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,707.60 : 163,927.50 = 76,339.68 : x
  2. Step 2: Convert to fraction form
    118,707.60/163,927.50 = 76,339.68/x
  3. Step 3: Cross multiply
    118,707.60x = 163,927.50 × 76,339.68
  4. Step 4: Simplify right side
    118,707.60x = 12,514,172,893.20
  5. Step 5: Solve for x
    x = 12,514,172,893.20/118,707.60
  6. Step 6: Final answer
    x = 105,420.15

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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.