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Finding the Fourth Proportional to 73,438.78, 101,345.10 and 39,904.78

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Solution

The fourth proportional to 73,438.78, 101,345.10 and 39,904.78 is: 55,068.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,438.78 : 101,345.10 = 39,904.78 : x
  2. Step 2: Convert to fraction form
    73,438.78/101,345.10 = 39,904.78/x
  3. Step 3: Cross multiply
    73,438.78x = 101,345.10 × 39,904.78
  4. Step 4: Simplify right side
    73,438.78x = 4,044,153,919.58
  5. Step 5: Solve for x
    x = 4,044,153,919.58/73,438.78
  6. Step 6: Final answer
    x = 55,068.37

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1.5x scale

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.