Home / 120,371,667.78-180,298,074.60-81,295,242.78

Finding the Fourth Proportional to 120,371,667.78, 180,298,074.60 and 81,295,242.78

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Solution

The fourth proportional to 120,371,667.78, 180,298,074.60 and 81,295,242.78 is: 121,767,655.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,371,667.78 : 180,298,074.60 = 81,295,242.78 : x
  2. Step 2: Convert to fraction form
    120,371,667.78/180,298,074.60 = 81,295,242.78/x
  3. Step 3: Cross multiply
    120,371,667.78x = 180,298,074.60 × 81,295,242.78
  4. Step 4: Simplify right side
    120,371,667.78x = 14,657,375,747,373,552
  5. Step 5: Solve for x
    x = 14,657,375,747,373,552/120,371,667.78
  6. Step 6: Final answer
    x = 121,767,655.28

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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.