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Finding the Fourth Proportional to 144,005.70, 216,008.55 and 128,259.30

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Solution

The fourth proportional to 144,005.70, 216,008.55 and 128,259.30 is: 192,388.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,005.70 : 216,008.55 = 128,259.30 : x
  2. Step 2: Convert to fraction form
    144,005.70/216,008.55 = 128,259.30/x
  3. Step 3: Cross multiply
    144,005.70x = 216,008.55 × 128,259.30
  4. Step 4: Simplify right side
    144,005.70x = 27,705,105,417.02
  5. Step 5: Solve for x
    x = 27,705,105,417.02/144,005.70
  6. Step 6: Final answer
    x = 192,388.95

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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.