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Finding the Fourth Proportional to 145,141.80, 217,712.70 and 109,712.40

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Solution

The fourth proportional to 145,141.80, 217,712.70 and 109,712.40 is: 164,568.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,141.80 : 217,712.70 = 109,712.40 : x
  2. Step 2: Convert to fraction form
    145,141.80/217,712.70 = 109,712.40/x
  3. Step 3: Cross multiply
    145,141.80x = 217,712.70 × 109,712.40
  4. Step 4: Simplify right side
    145,141.80x = 23,885,782,827.48
  5. Step 5: Solve for x
    x = 23,885,782,827.48/145,141.80
  6. Step 6: Final answer
    x = 164,568.60

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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.