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Finding the Fourth Proportional to 144,064.40, 215,999.40 and 69,220.40

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Solution

The fourth proportional to 144,064.40, 215,999.40 and 69,220.40 is: 103,783.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,064.40 : 215,999.40 = 69,220.40 : x
  2. Step 2: Convert to fraction form
    144,064.40/215,999.40 = 69,220.40/x
  3. Step 3: Cross multiply
    144,064.40x = 215,999.40 × 69,220.40
  4. Step 4: Simplify right side
    144,064.40x = 14,951,564,867.76
  5. Step 5: Solve for x
    x = 14,951,564,867.76/144,064.40
  6. Step 6: Final answer
    x = 103,783.90

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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.