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Finding the Fourth Proportional to 139,000.90, 208,501.35 and 82,904.35

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Solution

The fourth proportional to 139,000.90, 208,501.35 and 82,904.35 is: 124,356.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,000.90 : 208,501.35 = 82,904.35 : x
  2. Step 2: Convert to fraction form
    139,000.90/208,501.35 = 82,904.35/x
  3. Step 3: Cross multiply
    139,000.90x = 208,501.35 × 82,904.35
  4. Step 4: Simplify right side
    139,000.90x = 17,285,668,895.87
  5. Step 5: Solve for x
    x = 17,285,668,895.87/139,000.90
  6. Step 6: Final answer
    x = 124,356.53

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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.