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Finding the Fourth Proportional to 72,904, 100,607.52 and 39,370

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Solution

The fourth proportional to 72,904, 100,607.52 and 39,370 is: 54,330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,904 : 100,607.52 = 39,370 : x
  2. Step 2: Convert to fraction form
    72,904/100,607.52 = 39,370/x
  3. Step 3: Cross multiply
    72,904x = 100,607.52 × 39,370
  4. Step 4: Simplify right side
    72,904x = 3,960,918,062.40
  5. Step 5: Solve for x
    x = 3,960,918,062.40/72,904
  6. Step 6: Final answer
    x = 54,330.60

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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.