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Finding the Fourth Proportional to 60,646.70, 90,937.65 and 21,205.10

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Solution

The fourth proportional to 60,646.70, 90,937.65 and 21,205.10 is: 31,796.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,646.70 : 90,937.65 = 21,205.10 : x
  2. Step 2: Convert to fraction form
    60,646.70/90,937.65 = 21,205.10/x
  3. Step 3: Cross multiply
    60,646.70x = 90,937.65 × 21,205.10
  4. Step 4: Simplify right side
    60,646.70x = 1,928,341,962.02
  5. Step 5: Solve for x
    x = 1,928,341,962.02/60,646.70
  6. Step 6: Final answer
    x = 31,796.32

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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.