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Finding the Fourth Proportional to 65,867.60, 98,801.40 and 65,430.20

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Solution

The fourth proportional to 65,867.60, 98,801.40 and 65,430.20 is: 98,145.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,867.60 : 98,801.40 = 65,430.20 : x
  2. Step 2: Convert to fraction form
    65,867.60/98,801.40 = 65,430.20/x
  3. Step 3: Cross multiply
    65,867.60x = 98,801.40 × 65,430.20
  4. Step 4: Simplify right side
    65,867.60x = 6,464,595,362.28
  5. Step 5: Solve for x
    x = 6,464,595,362.28/65,867.60
  6. Step 6: Final answer
    x = 98,145.30

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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.