Home / 165,220,820.70-247,831,231.05-79,127,378.70

Finding the Fourth Proportional to 165,220,820.70, 247,831,231.05 and 79,127,378.70

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Solution

The fourth proportional to 165,220,820.70, 247,831,231.05 and 79,127,378.70 is: 118,691,068.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,220,820.70 : 247,831,231.05 = 79,127,378.70 : x
  2. Step 2: Convert to fraction form
    165,220,820.70/247,831,231.05 = 79,127,378.70/x
  3. Step 3: Cross multiply
    165,220,820.70x = 247,831,231.05 × 79,127,378.70
  4. Step 4: Simplify right side
    165,220,820.70x = 19,610,235,672,980,552
  5. Step 5: Solve for x
    x = 19,610,235,672,980,552/165,220,820.70
  6. Step 6: Final answer
    x = 118,691,068.05

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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.