Home / 138,651.44-191,339.10-74,989.16

Finding the Fourth Proportional to 138,651.44, 191,339.10 and 74,989.16

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Solution

The fourth proportional to 138,651.44, 191,339.10 and 74,989.16 is: 103,485.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,651.44 : 191,339.10 = 74,989.16 : x
  2. Step 2: Convert to fraction form
    138,651.44/191,339.10 = 74,989.16/x
  3. Step 3: Cross multiply
    138,651.44x = 191,339.10 × 74,989.16
  4. Step 4: Simplify right side
    138,651.44x = 14,348,358,384.16
  5. Step 5: Solve for x
    x = 14,348,358,384.16/138,651.44
  6. Step 6: Final answer
    x = 103,485.10

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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.