Home / 131,815.81-181,905.99-71,386.57

Finding the Fourth Proportional to 131,815.81, 181,905.99 and 71,386.57

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Solution

The fourth proportional to 131,815.81, 181,905.99 and 71,386.57 is: 98,513.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,815.81 : 181,905.99 = 71,386.57 : x
  2. Step 2: Convert to fraction form
    131,815.81/181,905.99 = 71,386.57/x
  3. Step 3: Cross multiply
    131,815.81x = 181,905.99 × 71,386.57
  4. Step 4: Simplify right side
    131,815.81x = 12,985,643,779.02
  5. Step 5: Solve for x
    x = 12,985,643,779.02/131,815.81
  6. Step 6: Final answer
    x = 98,513.56

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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.