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Finding the Fourth Proportional to 90,620.68, 125,030.64 and 54,784.68

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Solution

The fourth proportional to 90,620.68, 125,030.64 and 54,784.68 is: 75,587.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,620.68 : 125,030.64 = 54,784.68 : x
  2. Step 2: Convert to fraction form
    90,620.68/125,030.64 = 54,784.68/x
  3. Step 3: Cross multiply
    90,620.68x = 125,030.64 × 54,784.68
  4. Step 4: Simplify right side
    90,620.68x = 6,849,763,602.60
  5. Step 5: Solve for x
    x = 6,849,763,602.60/90,620.68
  6. Step 6: Final answer
    x = 75,587.20

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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.