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Finding the Fourth Proportional to 85,365.70, 128,048.55 and 36,111.30

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Solution

The fourth proportional to 85,365.70, 128,048.55 and 36,111.30 is: 54,166.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,365.70 : 128,048.55 = 36,111.30 : x
  2. Step 2: Convert to fraction form
    85,365.70/128,048.55 = 36,111.30/x
  3. Step 3: Cross multiply
    85,365.70x = 128,048.55 × 36,111.30
  4. Step 4: Simplify right side
    85,365.70x = 4,623,999,603.62
  5. Step 5: Solve for x
    x = 4,623,999,603.62/85,365.70
  6. Step 6: Final answer
    x = 54,166.95

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1.5x scale

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.