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Finding the Fourth Proportional to 74,349, 102,603.78 and 40,817.16

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Solution

The fourth proportional to 74,349, 102,603.78 and 40,817.16 is: 56,328.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,349 : 102,603.78 = 40,817.16 : x
  2. Step 2: Convert to fraction form
    74,349/102,603.78 = 40,817.16/x
  3. Step 3: Cross multiply
    74,349x = 102,603.78 × 40,817.16
  4. Step 4: Simplify right side
    74,349x = 4,187,994,904.86
  5. Step 5: Solve for x
    x = 4,187,994,904.86/74,349
  6. Step 6: Final answer
    x = 56,328.87

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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.