Home / 138,935.75-208,070.63-71,289.77

Finding the Fourth Proportional to 138,935.75, 208,070.63 and 71,289.77

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Solution

The fourth proportional to 138,935.75, 208,070.63 and 71,289.77 is: 106,763.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,935.75 : 208,070.63 = 71,289.77 : x
  2. Step 2: Convert to fraction form
    138,935.75/208,070.63 = 71,289.77/x
  3. Step 3: Cross multiply
    138,935.75x = 208,070.63 × 71,289.77
  4. Step 4: Simplify right side
    138,935.75x = 14,833,307,000.01
  5. Step 5: Solve for x
    x = 14,833,307,000.01/138,935.75
  6. Step 6: Final answer
    x = 106,763.79

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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.