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Finding the Fourth Proportional to 221,692,907.52, 305,946,875.52 and 122,571,820.80

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Solution

The fourth proportional to 221,692,907.52, 305,946,875.52 and 122,571,820.80 is: 169,155,008.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,692,907.52 : 305,946,875.52 = 122,571,820.80 : x
  2. Step 2: Convert to fraction form
    221,692,907.52/305,946,875.52 = 122,571,820.80/x
  3. Step 3: Cross multiply
    221,692,907.52x = 305,946,875.52 × 122,571,820.80
  4. Step 4: Simplify right side
    221,692,907.52x = 37,500,465,600,557,344
  5. Step 5: Solve for x
    x = 37,500,465,600,557,344/221,692,907.52
  6. Step 6: Final answer
    x = 169,155,008.25

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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.