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Finding the Fourth Proportional to 82,860.60, 124,308.90 and 30,270

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Solution

The fourth proportional to 82,860.60, 124,308.90 and 30,270 is: 45,411.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,860.60 : 124,308.90 = 30,270 : x
  2. Step 2: Convert to fraction form
    82,860.60/124,308.90 = 30,270/x
  3. Step 3: Cross multiply
    82,860.60x = 124,308.90 × 30,270
  4. Step 4: Simplify right side
    82,860.60x = 3,762,830,403
  5. Step 5: Solve for x
    x = 3,762,830,403/82,860.60
  6. Step 6: Final answer
    x = 45,411.58

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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.