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Finding the Fourth Proportional to 100,902.47, 139,245.42 and 58,485.60

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Solution

The fourth proportional to 100,902.47, 139,245.42 and 58,485.60 is: 80,710.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,902.47 : 139,245.42 = 58,485.60 : x
  2. Step 2: Convert to fraction form
    100,902.47/139,245.42 = 58,485.60/x
  3. Step 3: Cross multiply
    100,902.47x = 139,245.42 × 58,485.60
  4. Step 4: Simplify right side
    100,902.47x = 8,143,851,935.95
  5. Step 5: Solve for x
    x = 8,143,851,935.95/100,902.47
  6. Step 6: Final answer
    x = 80,710.14

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1.5x scale

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.