Home / 139,845.29-209,818.96-87,298.97

Finding the Fourth Proportional to 139,845.29, 209,818.96 and 87,298.97

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Solution

The fourth proportional to 139,845.29, 209,818.96 and 87,298.97 is: 130,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,845.29 : 209,818.96 = 87,298.97 : x
  2. Step 2: Convert to fraction form
    139,845.29/209,818.96 = 87,298.97/x
  3. Step 3: Cross multiply
    139,845.29x = 209,818.96 × 87,298.97
  4. Step 4: Simplify right side
    139,845.29x = 18,316,977,827.13
  5. Step 5: Solve for x
    x = 18,316,977,827.13/139,845.29
  6. Step 6: Final answer
    x = 130,980.30

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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.