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Finding the Fourth Proportional to 66,259.52, 99,258.08 and 42,902.40

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Solution

The fourth proportional to 66,259.52, 99,258.08 and 42,902.40 is: 64,268.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,259.52 : 99,258.08 = 42,902.40 : x
  2. Step 2: Convert to fraction form
    66,259.52/99,258.08 = 42,902.40/x
  3. Step 3: Cross multiply
    66,259.52x = 99,258.08 × 42,902.40
  4. Step 4: Simplify right side
    66,259.52x = 4,258,409,851.39
  5. Step 5: Solve for x
    x = 4,258,409,851.39/66,259.52
  6. Step 6: Final answer
    x = 64,268.65

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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.