Home / 85,452,401.55-128,178,603.95-20,755,770.69

Finding the Fourth Proportional to 85,452,401.55, 128,178,603.95 and 20,755,770.69

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Solution

The fourth proportional to 85,452,401.55, 128,178,603.95 and 20,755,770.69 is: 31,133,656.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,452,401.55 : 128,178,603.95 = 20,755,770.69 : x
  2. Step 2: Convert to fraction form
    85,452,401.55/128,178,603.95 = 20,755,770.69/x
  3. Step 3: Cross multiply
    85,452,401.55x = 128,178,603.95 × 20,755,770.69
  4. Step 4: Simplify right side
    85,452,401.55x = 2,660,445,710,846,749.50
  5. Step 5: Solve for x
    x = 2,660,445,710,846,749.50/85,452,401.55
  6. Step 6: Final answer
    x = 31,133,656.43

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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.