Home / 131,398,138.56-181,330,605-72,664,756.80

Finding the Fourth Proportional to 131,398,138.56, 181,330,605 and 72,664,756.80

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Solution

The fourth proportional to 131,398,138.56, 181,330,605 and 72,664,756.80 is: 100,278,013.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,398,138.56 : 181,330,605 = 72,664,756.80 : x
  2. Step 2: Convert to fraction form
    131,398,138.56/181,330,605 = 72,664,756.80/x
  3. Step 3: Cross multiply
    131,398,138.56x = 181,330,605 × 72,664,756.80
  4. Step 4: Simplify right side
    131,398,138.56x = 13,176,344,312,721,864
  5. Step 5: Solve for x
    x = 13,176,344,312,721,864/131,398,138.56
  6. Step 6: Final answer
    x = 100,278,013.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.