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Finding the Fourth Proportional to 80,742,790.20, 121,114,185.30 and 80,742,790.20

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Solution

The fourth proportional to 80,742,790.20, 121,114,185.30 and 80,742,790.20 is: 121,114,185.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,742,790.20 : 121,114,185.30 = 80,742,790.20 : x
  2. Step 2: Convert to fraction form
    80,742,790.20/121,114,185.30 = 80,742,790.20/x
  3. Step 3: Cross multiply
    80,742,790.20x = 121,114,185.30 × 80,742,790.20
  4. Step 4: Simplify right side
    80,742,790.20x = 9,779,097,253,921,824
  5. Step 5: Solve for x
    x = 9,779,097,253,921,824/80,742,790.20
  6. Step 6: Final answer
    x = 121,114,185.30

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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.