Home / 74,411.25-102,688.29-40,420.38

Finding the Fourth Proportional to 74,411.25, 102,688.29 and 40,420.38

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Solution

The fourth proportional to 74,411.25, 102,688.29 and 40,420.38 is: 55,780.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,411.25 : 102,688.29 = 40,420.38 : x
  2. Step 2: Convert to fraction form
    74,411.25/102,688.29 = 40,420.38/x
  3. Step 3: Cross multiply
    74,411.25x = 102,688.29 × 40,420.38
  4. Step 4: Simplify right side
    74,411.25x = 4,150,699,703.35
  5. Step 5: Solve for x
    x = 4,150,699,703.35/74,411.25
  6. Step 6: Final answer
    x = 55,780.54

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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.