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Finding the Fourth Proportional to 75,099, 112,207.20 and 72,482.40

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Solution

The fourth proportional to 75,099, 112,207.20 and 72,482.40 is: 108,297.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,099 : 112,207.20 = 72,482.40 : x
  2. Step 2: Convert to fraction form
    75,099/112,207.20 = 72,482.40/x
  3. Step 3: Cross multiply
    75,099x = 112,207.20 × 72,482.40
  4. Step 4: Simplify right side
    75,099x = 8,133,047,153.28
  5. Step 5: Solve for x
    x = 8,133,047,153.28/75,099
  6. Step 6: Final answer
    x = 108,297.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.