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Finding the Fourth Proportional to 139,430.56, 209,145.44 and 39,590.88

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Solution

The fourth proportional to 139,430.56, 209,145.44 and 39,590.88 is: 59,386.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,430.56 : 209,145.44 = 39,590.88 : x
  2. Step 2: Convert to fraction form
    139,430.56/209,145.44 = 39,590.88/x
  3. Step 3: Cross multiply
    139,430.56x = 209,145.44 × 39,590.88
  4. Step 4: Simplify right side
    139,430.56x = 8,280,252,017.59
  5. Step 5: Solve for x
    x = 8,280,252,017.59/139,430.56
  6. Step 6: Final answer
    x = 59,386.21

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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.