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Finding the Fourth Proportional to 140,286.30, 210,429.45 and 70,140.30

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Solution

The fourth proportional to 140,286.30, 210,429.45 and 70,140.30 is: 105,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,286.30 : 210,429.45 = 70,140.30 : x
  2. Step 2: Convert to fraction form
    140,286.30/210,429.45 = 70,140.30/x
  3. Step 3: Cross multiply
    140,286.30x = 210,429.45 × 70,140.30
  4. Step 4: Simplify right side
    140,286.30x = 14,759,584,751.84
  5. Step 5: Solve for x
    x = 14,759,584,751.84/140,286.30
  6. Step 6: Final answer
    x = 105,210.45

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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.