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Finding the Fourth Proportional to 65,987.60, 98,835.60 and 51,148.40

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Solution

The fourth proportional to 65,987.60, 98,835.60 and 51,148.40 is: 76,609.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,987.60 : 98,835.60 = 51,148.40 : x
  2. Step 2: Convert to fraction form
    65,987.60/98,835.60 = 51,148.40/x
  3. Step 3: Cross multiply
    65,987.60x = 98,835.60 × 51,148.40
  4. Step 4: Simplify right side
    65,987.60x = 5,055,282,803.04
  5. Step 5: Solve for x
    x = 5,055,282,803.04/65,987.60
  6. Step 6: Final answer
    x = 76,609.59

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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.