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Finding the Fourth Proportional to 140,645.80, 210,860.70 and 70,575.40

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Solution

The fourth proportional to 140,645.80, 210,860.70 and 70,575.40 is: 105,808.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,645.80 : 210,860.70 = 70,575.40 : x
  2. Step 2: Convert to fraction form
    140,645.80/210,860.70 = 70,575.40/x
  3. Step 3: Cross multiply
    140,645.80x = 210,860.70 × 70,575.40
  4. Step 4: Simplify right side
    140,645.80x = 14,881,578,246.78
  5. Step 5: Solve for x
    x = 14,881,578,246.78/140,645.80
  6. Step 6: Final answer
    x = 105,808.91

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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.