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Finding the Fourth Proportional to 139,387.55, 209,089.26 and 39,539.93

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Solution

The fourth proportional to 139,387.55, 209,089.26 and 39,539.93 is: 59,312.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,387.55 : 209,089.26 = 39,539.93 : x
  2. Step 2: Convert to fraction form
    139,387.55/209,089.26 = 39,539.93/x
  3. Step 3: Cross multiply
    139,387.55x = 209,089.26 × 39,539.93
  4. Step 4: Simplify right side
    139,387.55x = 8,267,373,658.71
  5. Step 5: Solve for x
    x = 8,267,373,658.71/139,387.55
  6. Step 6: Final answer
    x = 59,312.14

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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.