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Finding the Fourth Proportional to 203,559.99, 280,911.75 and 112,915.01

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Solution

The fourth proportional to 203,559.99, 280,911.75 and 112,915.01 is: 155,822.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,559.99 : 280,911.75 = 112,915.01 : x
  2. Step 2: Convert to fraction form
    203,559.99/280,911.75 = 112,915.01/x
  3. Step 3: Cross multiply
    203,559.99x = 280,911.75 × 112,915.01
  4. Step 4: Simplify right side
    203,559.99x = 31,719,153,339.22
  5. Step 5: Solve for x
    x = 31,719,153,339.22/203,559.99
  6. Step 6: Final answer
    x = 155,822.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.