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Finding the Fourth Proportional to 119,643.60, 179,465.40 and 72,987.60

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Solution

The fourth proportional to 119,643.60, 179,465.40 and 72,987.60 is: 109,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,643.60 : 179,465.40 = 72,987.60 : x
  2. Step 2: Convert to fraction form
    119,643.60/179,465.40 = 72,987.60/x
  3. Step 3: Cross multiply
    119,643.60x = 179,465.40 × 72,987.60
  4. Step 4: Simplify right side
    119,643.60x = 13,098,748,829.04
  5. Step 5: Solve for x
    x = 13,098,748,829.04/119,643.60
  6. Step 6: Final answer
    x = 109,481.40

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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.