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Finding the Fourth Proportional to 169,643.60, 254,611.20 and 75,019.40

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Solution

The fourth proportional to 169,643.60, 254,611.20 and 75,019.40 is: 112,593.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,643.60 : 254,611.20 = 75,019.40 : x
  2. Step 2: Convert to fraction form
    169,643.60/254,611.20 = 75,019.40/x
  3. Step 3: Cross multiply
    169,643.60x = 254,611.20 × 75,019.40
  4. Step 4: Simplify right side
    169,643.60x = 19,100,779,457.28
  5. Step 5: Solve for x
    x = 19,100,779,457.28/169,643.60
  6. Step 6: Final answer
    x = 112,593.58

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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.