Home / 278,839.62-417,916.80-128,877.03

Finding the Fourth Proportional to 278,839.62, 417,916.80 and 128,877.03

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Solution

The fourth proportional to 278,839.62, 417,916.80 and 128,877.03 is: 193,157.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,839.62 : 417,916.80 = 128,877.03 : x
  2. Step 2: Convert to fraction form
    278,839.62/417,916.80 = 128,877.03/x
  3. Step 3: Cross multiply
    278,839.62x = 417,916.80 × 128,877.03
  4. Step 4: Simplify right side
    278,839.62x = 53,859,875,971.10
  5. Step 5: Solve for x
    x = 53,859,875,971.10/278,839.62
  6. Step 6: Final answer
    x = 193,157.18

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1.5x scale

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.