Home / 103,429,372-142,733,632.80-57,021,286.72

Finding the Fourth Proportional to 103,429,372, 142,733,632.80 and 57,021,286.72

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Solution

The fourth proportional to 103,429,372, 142,733,632.80 and 57,021,286.72 is: 78,689,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,429,372 : 142,733,632.80 = 57,021,286.72 : x
  2. Step 2: Convert to fraction form
    103,429,372/142,733,632.80 = 57,021,286.72/x
  3. Step 3: Cross multiply
    103,429,372x = 142,733,632.80 × 57,021,286.72
  4. Step 4: Simplify right side
    103,429,372x = 8,138,855,400,475,997
  5. Step 5: Solve for x
    x = 8,138,855,400,475,997/103,429,372
  6. Step 6: Final answer
    x = 78,689,981.80

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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.