Home / 218,742.08-328,140.45-85,605.12

Finding the Fourth Proportional to 218,742.08, 328,140.45 and 85,605.12

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Solution

The fourth proportional to 218,742.08, 328,140.45 and 85,605.12 is: 128,418.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,742.08 : 328,140.45 = 85,605.12 : x
  2. Step 2: Convert to fraction form
    218,742.08/328,140.45 = 85,605.12/x
  3. Step 3: Cross multiply
    218,742.08x = 328,140.45 × 85,605.12
  4. Step 4: Simplify right side
    218,742.08x = 28,090,502,599.10
  5. Step 5: Solve for x
    x = 28,090,502,599.10/218,742.08
  6. Step 6: Final answer
    x = 128,418.38

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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.