Home / 139,731,333.44-209,328,368.24-78,133,666.52

Finding the Fourth Proportional to 139,731,333.44, 209,328,368.24 and 78,133,666.52

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Solution

The fourth proportional to 139,731,333.44, 209,328,368.24 and 78,133,666.52 is: 117,050,288.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,731,333.44 : 209,328,368.24 = 78,133,666.52 : x
  2. Step 2: Convert to fraction form
    139,731,333.44/209,328,368.24 = 78,133,666.52/x
  3. Step 3: Cross multiply
    139,731,333.44x = 209,328,368.24 × 78,133,666.52
  4. Step 4: Simplify right side
    139,731,333.44x = 16,355,592,917,239,920
  5. Step 5: Solve for x
    x = 16,355,592,917,239,920/139,731,333.44
  6. Step 6: Final answer
    x = 117,050,288.68

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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.