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Finding the Fourth Proportional to 99,607.68, 137,468.16 and 57,173.76

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Solution

The fourth proportional to 99,607.68, 137,468.16 and 57,173.76 is: 78,905.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,607.68 : 137,468.16 = 57,173.76 : x
  2. Step 2: Convert to fraction form
    99,607.68/137,468.16 = 57,173.76/x
  3. Step 3: Cross multiply
    99,607.68x = 137,468.16 × 57,173.76
  4. Step 4: Simplify right side
    99,607.68x = 7,859,571,587.48
  5. Step 5: Solve for x
    x = 7,859,571,587.48/99,607.68
  6. Step 6: Final answer
    x = 78,905.28

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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.