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Finding the Fourth Proportional to 20,121,355.30, 28,106,124.50 and 20,121,355.30

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Solution

The fourth proportional to 20,121,355.30, 28,106,124.50 and 20,121,355.30 is: 28,106,124.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121,355.30 : 28,106,124.50 = 20,121,355.30 : x
  2. Step 2: Convert to fraction form
    20,121,355.30/28,106,124.50 = 20,121,355.30/x
  3. Step 3: Cross multiply
    20,121,355.30x = 28,106,124.50 × 20,121,355.30
  4. Step 4: Simplify right side
    20,121,355.30x = 565,533,317,170,534.88
  5. Step 5: Solve for x
    x = 565,533,317,170,534.88/20,121,355.30
  6. Step 6: Final answer
    x = 28,106,124.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.