Home / 103,866.12-143,345.36-61,438.32

Finding the Fourth Proportional to 103,866.12, 143,345.36 and 61,438.32

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Solution

The fourth proportional to 103,866.12, 143,345.36 and 61,438.32 is: 84,790.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,866.12 : 143,345.36 = 61,438.32 : x
  2. Step 2: Convert to fraction form
    103,866.12/143,345.36 = 61,438.32/x
  3. Step 3: Cross multiply
    103,866.12x = 143,345.36 × 61,438.32
  4. Step 4: Simplify right side
    103,866.12x = 8,806,898,251.79
  5. Step 5: Solve for x
    x = 8,806,898,251.79/103,866.12
  6. Step 6: Final answer
    x = 84,790.87

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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.