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Finding the Fourth Proportional to 90,801.64, 136,202.46 and 28,477

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Solution

The fourth proportional to 90,801.64, 136,202.46 and 28,477 is: 42,715.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,801.64 : 136,202.46 = 28,477 : x
  2. Step 2: Convert to fraction form
    90,801.64/136,202.46 = 28,477/x
  3. Step 3: Cross multiply
    90,801.64x = 136,202.46 × 28,477
  4. Step 4: Simplify right side
    90,801.64x = 3,878,637,453.42
  5. Step 5: Solve for x
    x = 3,878,637,453.42/90,801.64
  6. Step 6: Final answer
    x = 42,715.50

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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.