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Finding the Fourth Proportional to 72,929.13, 109,223.72 and 70,403.58

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Solution

The fourth proportional to 72,929.13, 109,223.72 and 70,403.58 is: 105,441.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,929.13 : 109,223.72 = 70,403.58 : x
  2. Step 2: Convert to fraction form
    72,929.13/109,223.72 = 70,403.58/x
  3. Step 3: Cross multiply
    72,929.13x = 109,223.72 × 70,403.58
  4. Step 4: Simplify right side
    72,929.13x = 7,689,740,556.90
  5. Step 5: Solve for x
    x = 7,689,740,556.90/72,929.13
  6. Step 6: Final answer
    x = 105,441.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.