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Finding the Fourth Proportional to 74,607.62, 102,821.47 and 69,872.90

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Solution

The fourth proportional to 74,607.62, 102,821.47 and 69,872.90 is: 96,296.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,607.62 : 102,821.47 = 69,872.90 : x
  2. Step 2: Convert to fraction form
    74,607.62/102,821.47 = 69,872.90/x
  3. Step 3: Cross multiply
    74,607.62x = 102,821.47 × 69,872.90
  4. Step 4: Simplify right side
    74,607.62x = 7,184,433,602.37
  5. Step 5: Solve for x
    x = 7,184,433,602.37/74,607.62
  6. Step 6: Final answer
    x = 96,296.25

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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.