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Finding the Fourth Proportional to 70,780.77, 97,677.81 and 40,567.89

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Solution

The fourth proportional to 70,780.77, 97,677.81 and 40,567.89 is: 55,983.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,780.77 : 97,677.81 = 40,567.89 : x
  2. Step 2: Convert to fraction form
    70,780.77/97,677.81 = 40,567.89/x
  3. Step 3: Cross multiply
    70,780.77x = 97,677.81 × 40,567.89
  4. Step 4: Simplify right side
    70,780.77x = 3,962,582,651.52
  5. Step 5: Solve for x
    x = 3,962,582,651.52/70,780.77
  6. Step 6: Final answer
    x = 55,983.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.