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Finding the Fourth Proportional to 143,838.68, 198,492.81 and 90,152.69

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Solution

The fourth proportional to 143,838.68, 198,492.81 and 90,152.69 is: 124,407.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,838.68 : 198,492.81 = 90,152.69 : x
  2. Step 2: Convert to fraction form
    143,838.68/198,492.81 = 90,152.69/x
  3. Step 3: Cross multiply
    143,838.68x = 198,492.81 × 90,152.69
  4. Step 4: Simplify right side
    143,838.68x = 17,894,660,767.16
  5. Step 5: Solve for x
    x = 17,894,660,767.16/143,838.68
  6. Step 6: Final answer
    x = 124,407.85

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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.