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Finding the Fourth Proportional to 81,681.60, 122,595.30 and 70,600.80

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Solution

The fourth proportional to 81,681.60, 122,595.30 and 70,600.80 is: 105,964.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,681.60 : 122,595.30 = 70,600.80 : x
  2. Step 2: Convert to fraction form
    81,681.60/122,595.30 = 70,600.80/x
  3. Step 3: Cross multiply
    81,681.60x = 122,595.30 × 70,600.80
  4. Step 4: Simplify right side
    81,681.60x = 8,655,326,256.24
  5. Step 5: Solve for x
    x = 8,655,326,256.24/81,681.60
  6. Step 6: Final answer
    x = 105,964.21

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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.