Home / 108,909.25-163,210.65-86,623.72

Finding the Fourth Proportional to 108,909.25, 163,210.65 and 86,623.72

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Solution

The fourth proportional to 108,909.25, 163,210.65 and 86,623.72 is: 129,813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,909.25 : 163,210.65 = 86,623.72 : x
  2. Step 2: Convert to fraction form
    108,909.25/163,210.65 = 86,623.72/x
  3. Step 3: Cross multiply
    108,909.25x = 163,210.65 × 86,623.72
  4. Step 4: Simplify right side
    108,909.25x = 14,137,913,646.62
  5. Step 5: Solve for x
    x = 14,137,913,646.62/108,909.25
  6. Step 6: Final answer
    x = 129,813.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.