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Finding the Fourth Proportional to 70,728.84, 97,603.85 and 38,897.77

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Solution

The fourth proportional to 70,728.84, 97,603.85 and 38,897.77 is: 53,677.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,728.84 : 97,603.85 = 38,897.77 : x
  2. Step 2: Convert to fraction form
    70,728.84/97,603.85 = 38,897.77/x
  3. Step 3: Cross multiply
    70,728.84x = 97,603.85 × 38,897.77
  4. Step 4: Simplify right side
    70,728.84x = 3,796,571,961.65
  5. Step 5: Solve for x
    x = 3,796,571,961.65/70,728.84
  6. Step 6: Final answer
    x = 53,677.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.