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Finding the Fourth Proportional to 139,649.06, 209,442.03 and 39,807.11

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Solution

The fourth proportional to 139,649.06, 209,442.03 and 39,807.11 is: 59,701.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,649.06 : 209,442.03 = 39,807.11 : x
  2. Step 2: Convert to fraction form
    139,649.06/209,442.03 = 39,807.11/x
  3. Step 3: Cross multiply
    139,649.06x = 209,442.03 × 39,807.11
  4. Step 4: Simplify right side
    139,649.06x = 8,337,281,926.83
  5. Step 5: Solve for x
    x = 8,337,281,926.83/139,649.06
  6. Step 6: Final answer
    x = 59,701.67

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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.