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Finding the Fourth Proportional to 70,840.88, 97,760.56 and 39,009.84

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Solution

The fourth proportional to 70,840.88, 97,760.56 and 39,009.84 is: 53,833.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,840.88 : 97,760.56 = 39,009.84 : x
  2. Step 2: Convert to fraction form
    70,840.88/97,760.56 = 39,009.84/x
  3. Step 3: Cross multiply
    70,840.88x = 97,760.56 × 39,009.84
  4. Step 4: Simplify right side
    70,840.88x = 3,813,623,803.91
  5. Step 5: Solve for x
    x = 3,813,623,803.91/70,840.88
  6. Step 6: Final answer
    x = 53,833.66

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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.