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Finding the Fourth Proportional to 101,528.88, 152,380.81 and 70,386

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Solution

The fourth proportional to 101,528.88, 152,380.81 and 70,386 is: 105,639.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,528.88 : 152,380.81 = 70,386 : x
  2. Step 2: Convert to fraction form
    101,528.88/152,380.81 = 70,386/x
  3. Step 3: Cross multiply
    101,528.88x = 152,380.81 × 70,386
  4. Step 4: Simplify right side
    101,528.88x = 10,725,475,692.66
  5. Step 5: Solve for x
    x = 10,725,475,692.66/101,528.88
  6. Step 6: Final answer
    x = 105,639.65

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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.