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Finding the Fourth Proportional to 100,903.47, 139,246.80 and 58,486.60

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Solution

The fourth proportional to 100,903.47, 139,246.80 and 58,486.60 is: 80,711.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,903.47 : 139,246.80 = 58,486.60 : x
  2. Step 2: Convert to fraction form
    100,903.47/139,246.80 = 58,486.60/x
  3. Step 3: Cross multiply
    100,903.47x = 139,246.80 × 58,486.60
  4. Step 4: Simplify right side
    100,903.47x = 8,144,071,892.88
  5. Step 5: Solve for x
    x = 8,144,071,892.88/100,903.47
  6. Step 6: Final answer
    x = 80,711.51

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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.