Home / 209,240.15-288,748-113,749.25

Finding the Fourth Proportional to 209,240.15, 288,748 and 113,749.25

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Solution

The fourth proportional to 209,240.15, 288,748 and 113,749.25 is: 156,972.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,240.15 : 288,748 = 113,749.25 : x
  2. Step 2: Convert to fraction form
    209,240.15/288,748 = 113,749.25/x
  3. Step 3: Cross multiply
    209,240.15x = 288,748 × 113,749.25
  4. Step 4: Simplify right side
    209,240.15x = 32,844,868,439
  5. Step 5: Solve for x
    x = 32,844,868,439/209,240.15
  6. Step 6: Final answer
    x = 156,972.11

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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.