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Finding the Fourth Proportional to 210,187.60, 315,281.40 and 85,464.40

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Solution

The fourth proportional to 210,187.60, 315,281.40 and 85,464.40 is: 128,196.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,187.60 : 315,281.40 = 85,464.40 : x
  2. Step 2: Convert to fraction form
    210,187.60/315,281.40 = 85,464.40/x
  3. Step 3: Cross multiply
    210,187.60x = 315,281.40 × 85,464.40
  4. Step 4: Simplify right side
    210,187.60x = 26,945,335,682.16
  5. Step 5: Solve for x
    x = 26,945,335,682.16/210,187.60
  6. Step 6: Final answer
    x = 128,196.60

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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.