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Finding the Fourth Proportional to 190,276.80, 285,210.40 and 71,902.40

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Solution

The fourth proportional to 190,276.80, 285,210.40 and 71,902.40 is: 107,776.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,276.80 : 285,210.40 = 71,902.40 : x
  2. Step 2: Convert to fraction form
    190,276.80/285,210.40 = 71,902.40/x
  3. Step 3: Cross multiply
    190,276.80x = 285,210.40 × 71,902.40
  4. Step 4: Simplify right side
    190,276.80x = 20,507,312,264.96
  5. Step 5: Solve for x
    x = 20,507,312,264.96/190,276.80
  6. Step 6: Final answer
    x = 107,776.21

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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.