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Finding the Fourth Proportional to 74,662,709.60, 112,012,953.60 and 20,810,021.60

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Solution

The fourth proportional to 74,662,709.60, 112,012,953.60 and 20,810,021.60 is: 31,220,297.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,662,709.60 : 112,012,953.60 = 20,810,021.60 : x
  2. Step 2: Convert to fraction form
    74,662,709.60/112,012,953.60 = 20,810,021.60/x
  3. Step 3: Cross multiply
    74,662,709.60x = 112,012,953.60 × 20,810,021.60
  4. Step 4: Simplify right side
    74,662,709.60x = 2,330,991,983,895,798
  5. Step 5: Solve for x
    x = 2,330,991,983,895,798/74,662,709.60
  6. Step 6: Final answer
    x = 31,220,297.21

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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.