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Finding the Fourth Proportional to 145,758.94, 218,321.28 and 70,720.70

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Solution

The fourth proportional to 145,758.94, 218,321.28 and 70,720.70 is: 105,927.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,758.94 : 218,321.28 = 70,720.70 : x
  2. Step 2: Convert to fraction form
    145,758.94/218,321.28 = 70,720.70/x
  3. Step 3: Cross multiply
    145,758.94x = 218,321.28 × 70,720.70
  4. Step 4: Simplify right side
    145,758.94x = 15,439,832,654.89
  5. Step 5: Solve for x
    x = 15,439,832,654.89/145,758.94
  6. Step 6: Final answer
    x = 105,927.18

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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.