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Finding the Fourth Proportional to 243,357.48, 365,057.64 and 85,587.12

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Solution

The fourth proportional to 243,357.48, 365,057.64 and 85,587.12 is: 128,388.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,357.48 : 365,057.64 = 85,587.12 : x
  2. Step 2: Convert to fraction form
    243,357.48/365,057.64 = 85,587.12/x
  3. Step 3: Cross multiply
    243,357.48x = 365,057.64 × 85,587.12
  4. Step 4: Simplify right side
    243,357.48x = 31,244,232,041.60
  5. Step 5: Solve for x
    x = 31,244,232,041.60/243,357.48
  6. Step 6: Final answer
    x = 128,388.21

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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.