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Finding the Fourth Proportional to 140,572.80, 210,751.20 and 70,502.40

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Solution

The fourth proportional to 140,572.80, 210,751.20 and 70,502.40 is: 105,699.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,572.80 : 210,751.20 = 70,502.40 : x
  2. Step 2: Convert to fraction form
    140,572.80/210,751.20 = 70,502.40/x
  3. Step 3: Cross multiply
    140,572.80x = 210,751.20 × 70,502.40
  4. Step 4: Simplify right side
    140,572.80x = 14,858,465,402.88
  5. Step 5: Solve for x
    x = 14,858,465,402.88/140,572.80
  6. Step 6: Final answer
    x = 105,699.43

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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.