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Finding the Fourth Proportional to 190,666.80, 285,913.80 and 72,298.80

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Solution

The fourth proportional to 190,666.80, 285,913.80 and 72,298.80 is: 108,415.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,666.80 : 285,913.80 = 72,298.80 : x
  2. Step 2: Convert to fraction form
    190,666.80/285,913.80 = 72,298.80/x
  3. Step 3: Cross multiply
    190,666.80x = 285,913.80 × 72,298.80
  4. Step 4: Simplify right side
    190,666.80x = 20,671,224,643.44
  5. Step 5: Solve for x
    x = 20,671,224,643.44/190,666.80
  6. Step 6: Final answer
    x = 108,415.44

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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.