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Finding the Fourth Proportional to 219,363.16, 302,723.16 and 128,720.64

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Solution

The fourth proportional to 219,363.16, 302,723.16 and 128,720.64 is: 177,635.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,363.16 : 302,723.16 = 128,720.64 : x
  2. Step 2: Convert to fraction form
    219,363.16/302,723.16 = 128,720.64/x
  3. Step 3: Cross multiply
    219,363.16x = 302,723.16 × 128,720.64
  4. Step 4: Simplify right side
    219,363.16x = 38,966,718,082.39
  5. Step 5: Solve for x
    x = 38,966,718,082.39/219,363.16
  6. Step 6: Final answer
    x = 177,635.65

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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.