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Finding the Fourth Proportional to 145,008.60, 217,512.90 and 127,901.40

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Solution

The fourth proportional to 145,008.60, 217,512.90 and 127,901.40 is: 191,852.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,008.60 : 217,512.90 = 127,901.40 : x
  2. Step 2: Convert to fraction form
    145,008.60/217,512.90 = 127,901.40/x
  3. Step 3: Cross multiply
    145,008.60x = 217,512.90 × 127,901.40
  4. Step 4: Simplify right side
    145,008.60x = 27,820,204,428.06
  5. Step 5: Solve for x
    x = 27,820,204,428.06/145,008.60
  6. Step 6: Final answer
    x = 191,852.10

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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.