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Finding the Fourth Proportional to 253,633.08, 380,420.82 and 66,659.16

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Solution

The fourth proportional to 253,633.08, 380,420.82 and 66,659.16 is: 99,981.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,633.08 : 380,420.82 = 66,659.16 : x
  2. Step 2: Convert to fraction form
    253,633.08/380,420.82 = 66,659.16/x
  3. Step 3: Cross multiply
    253,633.08x = 380,420.82 × 66,659.16
  4. Step 4: Simplify right side
    253,633.08x = 25,358,532,307.71
  5. Step 5: Solve for x
    x = 25,358,532,307.71/253,633.08
  6. Step 6: Final answer
    x = 99,981.17

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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.