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Finding the Fourth Proportional to 66,308.02, 99,482.78 and 42,642.29

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Solution

The fourth proportional to 66,308.02, 99,482.78 and 42,642.29 is: 63,976.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,308.02 : 99,482.78 = 42,642.29 : x
  2. Step 2: Convert to fraction form
    66,308.02/99,482.78 = 42,642.29/x
  3. Step 3: Cross multiply
    66,308.02x = 99,482.78 × 42,642.29
  4. Step 4: Simplify right side
    66,308.02x = 4,242,173,110.63
  5. Step 5: Solve for x
    x = 4,242,173,110.63/66,308.02
  6. Step 6: Final answer
    x = 63,976.77

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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.