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Finding the Fourth Proportional to 66,879.79, 99,730.23 and 66,280.21

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Solution

The fourth proportional to 66,879.79, 99,730.23 and 66,280.21 is: 98,836.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,879.79 : 99,730.23 = 66,280.21 : x
  2. Step 2: Convert to fraction form
    66,879.79/99,730.23 = 66,280.21/x
  3. Step 3: Cross multiply
    66,879.79x = 99,730.23 × 66,280.21
  4. Step 4: Simplify right side
    66,879.79x = 6,610,140,587.75
  5. Step 5: Solve for x
    x = 6,610,140,587.75/66,879.79
  6. Step 6: Final answer
    x = 98,836.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.