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Finding the Fourth Proportional to 85,968,267.70, 128,952,401.55 and 57,120,862.90

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Solution

The fourth proportional to 85,968,267.70, 128,952,401.55 and 57,120,862.90 is: 85,681,294.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,968,267.70 : 128,952,401.55 = 57,120,862.90 : x
  2. Step 2: Convert to fraction form
    85,968,267.70/128,952,401.55 = 57,120,862.90/x
  3. Step 3: Cross multiply
    85,968,267.70x = 128,952,401.55 × 57,120,862.90
  4. Step 4: Simplify right side
    85,968,267.70x = 7,365,872,449,563,297
  5. Step 5: Solve for x
    x = 7,365,872,449,563,297/85,968,267.70
  6. Step 6: Final answer
    x = 85,681,294.35

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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.