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Finding the Fourth Proportional to 140,688.40, 211,032.60 and 40,848.40

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Solution

The fourth proportional to 140,688.40, 211,032.60 and 40,848.40 is: 61,272.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,688.40 : 211,032.60 = 40,848.40 : x
  2. Step 2: Convert to fraction form
    140,688.40/211,032.60 = 40,848.40/x
  3. Step 3: Cross multiply
    140,688.40x = 211,032.60 × 40,848.40
  4. Step 4: Simplify right side
    140,688.40x = 8,620,344,057.84
  5. Step 5: Solve for x
    x = 8,620,344,057.84/140,688.40
  6. Step 6: Final answer
    x = 61,272.60

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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.