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Finding the Fourth Proportional to 210,772.80, 316,159.20 and 122,199.30

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Solution

The fourth proportional to 210,772.80, 316,159.20 and 122,199.30 is: 183,298.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,772.80 : 316,159.20 = 122,199.30 : x
  2. Step 2: Convert to fraction form
    210,772.80/316,159.20 = 122,199.30/x
  3. Step 3: Cross multiply
    210,772.80x = 316,159.20 × 122,199.30
  4. Step 4: Simplify right side
    210,772.80x = 38,634,432,928.56
  5. Step 5: Solve for x
    x = 38,634,432,928.56/210,772.80
  6. Step 6: Final answer
    x = 183,298.95

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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.