Home / 75,677.79-103,679.04-72,840.16

Finding the Fourth Proportional to 75,677.79, 103,679.04 and 72,840.16

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Solution

The fourth proportional to 75,677.79, 103,679.04 and 72,840.16 is: 99,791.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,677.79 : 103,679.04 = 72,840.16 : x
  2. Step 2: Convert to fraction form
    75,677.79/103,679.04 = 72,840.16/x
  3. Step 3: Cross multiply
    75,677.79x = 103,679.04 × 72,840.16
  4. Step 4: Simplify right side
    75,677.79x = 7,551,997,855.27
  5. Step 5: Solve for x
    x = 7,551,997,855.27/75,677.79
  6. Step 6: Final answer
    x = 99,791.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.