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Finding the Fourth Proportional to 60,455.79, 90,700.02 and 21,015.09

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Solution

The fourth proportional to 60,455.79, 90,700.02 and 21,015.09 is: 31,528.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,455.79 : 90,700.02 = 21,015.09 : x
  2. Step 2: Convert to fraction form
    60,455.79/90,700.02 = 21,015.09/x
  3. Step 3: Cross multiply
    60,455.79x = 90,700.02 × 21,015.09
  4. Step 4: Simplify right side
    60,455.79x = 1,906,069,083.30
  5. Step 5: Solve for x
    x = 1,906,069,083.30/60,455.79
  6. Step 6: Final answer
    x = 31,528.31

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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.