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Finding the Fourth Proportional to 139,068,932.80, 208,678,048.80 and 58,298,065.60

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Solution

The fourth proportional to 139,068,932.80, 208,678,048.80 and 58,298,065.60 is: 87,478,391.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,068,932.80 : 208,678,048.80 = 58,298,065.60 : x
  2. Step 2: Convert to fraction form
    139,068,932.80/208,678,048.80 = 58,298,065.60/x
  3. Step 3: Cross multiply
    139,068,932.80x = 208,678,048.80 × 58,298,065.60
  4. Step 4: Simplify right side
    139,068,932.80x = 12,165,526,578,222,402
  5. Step 5: Solve for x
    x = 12,165,526,578,222,402/139,068,932.80
  6. Step 6: Final answer
    x = 87,478,391.71

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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.