Home / 278,823.10-418,234.65-91,810.30

Finding the Fourth Proportional to 278,823.10, 418,234.65 and 91,810.30

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Solution

The fourth proportional to 278,823.10, 418,234.65 and 91,810.30 is: 137,715.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,823.10 : 418,234.65 = 91,810.30 : x
  2. Step 2: Convert to fraction form
    278,823.10/418,234.65 = 91,810.30/x
  3. Step 3: Cross multiply
    278,823.10x = 418,234.65 × 91,810.30
  4. Step 4: Simplify right side
    278,823.10x = 38,398,248,686.90
  5. Step 5: Solve for x
    x = 38,398,248,686.90/278,823.10
  6. Step 6: Final answer
    x = 137,715.45

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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.