Home / 278,746.64-418,056.96-128,904.88

Finding the Fourth Proportional to 278,746.64, 418,056.96 and 128,904.88

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Solution

The fourth proportional to 278,746.64, 418,056.96 and 128,904.88 is: 193,328.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,746.64 : 418,056.96 = 128,904.88 : x
  2. Step 2: Convert to fraction form
    278,746.64/418,056.96 = 128,904.88/x
  3. Step 3: Cross multiply
    278,746.64x = 418,056.96 × 128,904.88
  4. Step 4: Simplify right side
    278,746.64x = 53,889,582,261.96
  5. Step 5: Solve for x
    x = 53,889,582,261.96/278,746.64
  6. Step 6: Final answer
    x = 193,328.19

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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.