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Finding the Fourth Proportional to 154,271.57, 212,891.95 and 87,203.57

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Solution

The fourth proportional to 154,271.57, 212,891.95 and 87,203.57 is: 120,339.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,271.57 : 212,891.95 = 87,203.57 : x
  2. Step 2: Convert to fraction form
    154,271.57/212,891.95 = 87,203.57/x
  3. Step 3: Cross multiply
    154,271.57x = 212,891.95 × 87,203.57
  4. Step 4: Simplify right side
    154,271.57x = 18,564,938,705.50
  5. Step 5: Solve for x
    x = 18,564,938,705.50/154,271.57
  6. Step 6: Final answer
    x = 120,339.34

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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.