Home / 138,785.60-191,403.04-111,920.32

Finding the Fourth Proportional to 138,785.60, 191,403.04 and 111,920.32

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Solution

The fourth proportional to 138,785.60, 191,403.04 and 111,920.32 is: 154,352.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,785.60 : 191,403.04 = 111,920.32 : x
  2. Step 2: Convert to fraction form
    138,785.60/191,403.04 = 111,920.32/x
  3. Step 3: Cross multiply
    138,785.60x = 191,403.04 × 111,920.32
  4. Step 4: Simplify right side
    138,785.60x = 21,421,889,485.77
  5. Step 5: Solve for x
    x = 21,421,889,485.77/138,785.60
  6. Step 6: Final answer
    x = 154,352.39

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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.