Home / 72,371,430.78-99,870,891.72-39,330,895.74

Finding the Fourth Proportional to 72,371,430.78, 99,870,891.72 and 39,330,895.74

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Solution

The fourth proportional to 72,371,430.78, 99,870,891.72 and 39,330,895.74 is: 54,275,721.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,371,430.78 : 99,870,891.72 = 39,330,895.74 : x
  2. Step 2: Convert to fraction form
    72,371,430.78/99,870,891.72 = 39,330,895.74/x
  3. Step 3: Cross multiply
    72,371,430.78x = 99,870,891.72 × 39,330,895.74
  4. Step 4: Simplify right side
    72,371,430.78x = 3,928,011,629,700,149.50
  5. Step 5: Solve for x
    x = 3,928,011,629,700,149.50/72,371,430.78
  6. Step 6: Final answer
    x = 54,275,721.61

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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.