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Finding the Fourth Proportional to 140,625.80, 210,830.70 and 70,555.40

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Solution

The fourth proportional to 140,625.80, 210,830.70 and 70,555.40 is: 105,778.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,625.80 : 210,830.70 = 70,555.40 : x
  2. Step 2: Convert to fraction form
    140,625.80/210,830.70 = 70,555.40/x
  3. Step 3: Cross multiply
    140,625.80x = 210,830.70 × 70,555.40
  4. Step 4: Simplify right side
    140,625.80x = 14,875,244,370.78
  5. Step 5: Solve for x
    x = 14,875,244,370.78/140,625.80
  6. Step 6: Final answer
    x = 105,778.91

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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.