Home / 51,121.20-76,681.80-42,956.40

Finding the Fourth Proportional to 51,121.20, 76,681.80 and 42,956.40

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Solution

The fourth proportional to 51,121.20, 76,681.80 and 42,956.40 is: 64,434.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,121.20 : 76,681.80 = 42,956.40 : x
  2. Step 2: Convert to fraction form
    51,121.20/76,681.80 = 42,956.40/x
  3. Step 3: Cross multiply
    51,121.20x = 76,681.80 × 42,956.40
  4. Step 4: Simplify right side
    51,121.20x = 3,293,974,073.52
  5. Step 5: Solve for x
    x = 3,293,974,073.52/51,121.20
  6. Step 6: Final answer
    x = 64,434.60

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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.