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Finding the Fourth Proportional to 74,477.78, 102,781.32 and 40,488.54

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Solution

The fourth proportional to 74,477.78, 102,781.32 and 40,488.54 is: 55,875.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,477.78 : 102,781.32 = 40,488.54 : x
  2. Step 2: Convert to fraction form
    74,477.78/102,781.32 = 40,488.54/x
  3. Step 3: Cross multiply
    74,477.78x = 102,781.32 × 40,488.54
  4. Step 4: Simplify right side
    74,477.78x = 4,161,465,586.07
  5. Step 5: Solve for x
    x = 4,161,465,586.07/74,477.78
  6. Step 6: Final answer
    x = 55,875.27

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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.