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Finding the Fourth Proportional to 74,064.40, 102,208.32 and 40,530.40

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Solution

The fourth proportional to 74,064.40, 102,208.32 and 40,530.40 is: 55,931.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,064.40 : 102,208.32 = 40,530.40 : x
  2. Step 2: Convert to fraction form
    74,064.40/102,208.32 = 40,530.40/x
  3. Step 3: Cross multiply
    74,064.40x = 102,208.32 × 40,530.40
  4. Step 4: Simplify right side
    74,064.40x = 4,142,544,092.93
  5. Step 5: Solve for x
    x = 4,142,544,092.93/74,064.40
  6. Step 6: Final answer
    x = 55,931.65

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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.