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Finding the Fourth Proportional to 74,689.50, 103,070.17 and 40,698.22

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Solution

The fourth proportional to 74,689.50, 103,070.17 and 40,698.22 is: 56,162.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,689.50 : 103,070.17 = 40,698.22 : x
  2. Step 2: Convert to fraction form
    74,689.50/103,070.17 = 40,698.22/x
  3. Step 3: Cross multiply
    74,689.50x = 103,070.17 × 40,698.22
  4. Step 4: Simplify right side
    74,689.50x = 4,194,772,454.10
  5. Step 5: Solve for x
    x = 4,194,772,454.10/74,689.50
  6. Step 6: Final answer
    x = 56,162.81

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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.