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Finding the Fourth Proportional to 100,425.84, 150,342.90 and 87,970.20

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Solution

The fourth proportional to 100,425.84, 150,342.90 and 87,970.20 is: 131,696.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,425.84 : 150,342.90 = 87,970.20 : x
  2. Step 2: Convert to fraction form
    100,425.84/150,342.90 = 87,970.20/x
  3. Step 3: Cross multiply
    100,425.84x = 150,342.90 × 87,970.20
  4. Step 4: Simplify right side
    100,425.84x = 13,225,694,981.58
  5. Step 5: Solve for x
    x = 13,225,694,981.58/100,425.84
  6. Step 6: Final answer
    x = 131,696.13

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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.