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Finding the Fourth Proportional to 102,812.88, 141,838.84 and 69,220.56

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Solution

The fourth proportional to 102,812.88, 141,838.84 and 69,220.56 is: 95,495.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,812.88 : 141,838.84 = 69,220.56 : x
  2. Step 2: Convert to fraction form
    102,812.88/141,838.84 = 69,220.56/x
  3. Step 3: Cross multiply
    102,812.88x = 141,838.84 × 69,220.56
  4. Step 4: Simplify right side
    102,812.88x = 9,818,163,934.55
  5. Step 5: Solve for x
    x = 9,818,163,934.55/102,812.88
  6. Step 6: Final answer
    x = 95,495.47

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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.