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Finding the Fourth Proportional to 66,547.70, 99,821.55 and 65,672.90

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Solution

The fourth proportional to 66,547.70, 99,821.55 and 65,672.90 is: 98,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,547.70 : 99,821.55 = 65,672.90 : x
  2. Step 2: Convert to fraction form
    66,547.70/99,821.55 = 65,672.90/x
  3. Step 3: Cross multiply
    66,547.70x = 99,821.55 × 65,672.90
  4. Step 4: Simplify right side
    66,547.70x = 6,555,570,671.00
  5. Step 5: Solve for x
    x = 6,555,570,671.00/66,547.70
  6. Step 6: Final answer
    x = 98,509.35

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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.