Home / 139,969,009.90-209,953,514.85-78,747,006.70

Finding the Fourth Proportional to 139,969,009.90, 209,953,514.85 and 78,747,006.70

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Solution

The fourth proportional to 139,969,009.90, 209,953,514.85 and 78,747,006.70 is: 118,120,510.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,009.90 : 209,953,514.85 = 78,747,006.70 : x
  2. Step 2: Convert to fraction form
    139,969,009.90/209,953,514.85 = 78,747,006.70/x
  3. Step 3: Cross multiply
    139,969,009.90x = 209,953,514.85 × 78,747,006.70
  4. Step 4: Simplify right side
    139,969,009.90x = 16,533,210,840,581,500
  5. Step 5: Solve for x
    x = 16,533,210,840,581,500/139,969,009.90
  6. Step 6: Final answer
    x = 118,120,510.05

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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.