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Finding the Fourth Proportional to 190,447.88, 285,582.28 and 70,421.90

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Solution

The fourth proportional to 190,447.88, 285,582.28 and 70,421.90 is: 105,599.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,447.88 : 285,582.28 = 70,421.90 : x
  2. Step 2: Convert to fraction form
    190,447.88/285,582.28 = 70,421.90/x
  3. Step 3: Cross multiply
    190,447.88x = 285,582.28 × 70,421.90
  4. Step 4: Simplify right side
    190,447.88x = 20,111,246,763.93
  5. Step 5: Solve for x
    x = 20,111,246,763.93/190,447.88
  6. Step 6: Final answer
    x = 105,599.74

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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.