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Finding the Fourth Proportional to 154,441, 213,128.58 and 87,373

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Solution

The fourth proportional to 154,441, 213,128.58 and 87,373 is: 120,574.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,441 : 213,128.58 = 87,373 : x
  2. Step 2: Convert to fraction form
    154,441/213,128.58 = 87,373/x
  3. Step 3: Cross multiply
    154,441x = 213,128.58 × 87,373
  4. Step 4: Simplify right side
    154,441x = 18,621,683,420.34
  5. Step 5: Solve for x
    x = 18,621,683,420.34/154,441
  6. Step 6: Final answer
    x = 120,574.74

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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.