Home / 191,724.30-287,258.40-121,521.60

Finding the Fourth Proportional to 191,724.30, 287,258.40 and 121,521.60

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Solution

The fourth proportional to 191,724.30, 287,258.40 and 121,521.60 is: 182,074.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,724.30 : 287,258.40 = 121,521.60 : x
  2. Step 2: Convert to fraction form
    191,724.30/287,258.40 = 121,521.60/x
  3. Step 3: Cross multiply
    191,724.30x = 287,258.40 × 121,521.60
  4. Step 4: Simplify right side
    191,724.30x = 34,908,100,381.44
  5. Step 5: Solve for x
    x = 34,908,100,381.44/191,724.30
  6. Step 6: Final answer
    x = 182,074.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.