Home / 210,905.20-316,385.55-77,878.90

Finding the Fourth Proportional to 210,905.20, 316,385.55 and 77,878.90

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Solution

The fourth proportional to 210,905.20, 316,385.55 and 77,878.90 is: 116,828.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,905.20 : 316,385.55 = 77,878.90 : x
  2. Step 2: Convert to fraction form
    210,905.20/316,385.55 = 77,878.90/x
  3. Step 3: Cross multiply
    210,905.20x = 316,385.55 × 77,878.90
  4. Step 4: Simplify right side
    210,905.20x = 24,639,758,609.90
  5. Step 5: Solve for x
    x = 24,639,758,609.90/210,905.20
  6. Step 6: Final answer
    x = 116,828.60

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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.