Home / 210,431.40-315,785.21-77,312.76

Finding the Fourth Proportional to 210,431.40, 315,785.21 and 77,312.76

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Solution

The fourth proportional to 210,431.40, 315,785.21 and 77,312.76 is: 116,019.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,431.40 : 315,785.21 = 77,312.76 : x
  2. Step 2: Convert to fraction form
    210,431.40/315,785.21 = 77,312.76/x
  3. Step 3: Cross multiply
    210,431.40x = 315,785.21 × 77,312.76
  4. Step 4: Simplify right side
    210,431.40x = 24,414,225,765.72
  5. Step 5: Solve for x
    x = 24,414,225,765.72/210,431.40
  6. Step 6: Final answer
    x = 116,019.88

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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.