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Finding the Fourth Proportional to 154,229.76, 212,838.72 and 90,568.32

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Solution

The fourth proportional to 154,229.76, 212,838.72 and 90,568.32 is: 124,985.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,229.76 : 212,838.72 = 90,568.32 : x
  2. Step 2: Convert to fraction form
    154,229.76/212,838.72 = 90,568.32/x
  3. Step 3: Cross multiply
    154,229.76x = 212,838.72 × 90,568.32
  4. Step 4: Simplify right side
    154,229.76x = 19,276,445,301.35
  5. Step 5: Solve for x
    x = 19,276,445,301.35/154,229.76
  6. Step 6: Final answer
    x = 124,985.25

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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.