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Finding the Fourth Proportional to 210,785.82, 316,303.20 and 77,758.98

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Solution

The fourth proportional to 210,785.82, 316,303.20 and 77,758.98 is: 116,684.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,785.82 : 316,303.20 = 77,758.98 : x
  2. Step 2: Convert to fraction form
    210,785.82/316,303.20 = 77,758.98/x
  3. Step 3: Cross multiply
    210,785.82x = 316,303.20 × 77,758.98
  4. Step 4: Simplify right side
    210,785.82x = 24,595,414,202.74
  5. Step 5: Solve for x
    x = 24,595,414,202.74/210,785.82
  6. Step 6: Final answer
    x = 116,684.39

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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.