Home / 118,511.12-163,654.47-76,143.47

Finding the Fourth Proportional to 118,511.12, 163,654.47 and 76,143.47

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Solution

The fourth proportional to 118,511.12, 163,654.47 and 76,143.47 is: 105,148.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,511.12 : 163,654.47 = 76,143.47 : x
  2. Step 2: Convert to fraction form
    118,511.12/163,654.47 = 76,143.47/x
  3. Step 3: Cross multiply
    118,511.12x = 163,654.47 × 76,143.47
  4. Step 4: Simplify right side
    118,511.12x = 12,461,218,408.54
  5. Step 5: Solve for x
    x = 12,461,218,408.54/118,511.12
  6. Step 6: Final answer
    x = 105,148.10

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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.