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Finding the Fourth Proportional to 145,208.60, 217,812.90 and 141,320.60

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Solution

The fourth proportional to 145,208.60, 217,812.90 and 141,320.60 is: 211,980.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,208.60 : 217,812.90 = 141,320.60 : x
  2. Step 2: Convert to fraction form
    145,208.60/217,812.90 = 141,320.60/x
  3. Step 3: Cross multiply
    145,208.60x = 217,812.90 × 141,320.60
  4. Step 4: Simplify right side
    145,208.60x = 30,781,449,715.74
  5. Step 5: Solve for x
    x = 30,781,449,715.74/145,208.60
  6. Step 6: Final answer
    x = 211,980.90

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1.5x scale

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.