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Finding the Fourth Proportional to 139,969,009.30, 209,953,513.95 and 59,189,977.30

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Solution

The fourth proportional to 139,969,009.30, 209,953,513.95 and 59,189,977.30 is: 88,784,965.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,009.30 : 209,953,513.95 = 59,189,977.30 : x
  2. Step 2: Convert to fraction form
    139,969,009.30/209,953,513.95 = 59,189,977.30/x
  3. Step 3: Cross multiply
    139,969,009.30x = 209,953,513.95 × 59,189,977.30
  4. Step 4: Simplify right side
    139,969,009.30x = 12,427,143,724,755,732
  5. Step 5: Solve for x
    x = 12,427,143,724,755,732/139,969,009.30
  6. Step 6: Final answer
    x = 88,784,965.95

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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.