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Finding the Fourth Proportional to 82,274.40, 123,411.60 and 77,090.40

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Solution

The fourth proportional to 82,274.40, 123,411.60 and 77,090.40 is: 115,635.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,274.40 : 123,411.60 = 77,090.40 : x
  2. Step 2: Convert to fraction form
    82,274.40/123,411.60 = 77,090.40/x
  3. Step 3: Cross multiply
    82,274.40x = 123,411.60 × 77,090.40
  4. Step 4: Simplify right side
    82,274.40x = 9,513,849,608.64
  5. Step 5: Solve for x
    x = 9,513,849,608.64/82,274.40
  6. Step 6: Final answer
    x = 115,635.60

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1.5x scale

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.