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Finding the Fourth Proportional to 121,355.60, 181,903.80 and 46,446.80

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Solution

The fourth proportional to 121,355.60, 181,903.80 and 46,446.80 is: 69,620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,355.60 : 181,903.80 = 46,446.80 : x
  2. Step 2: Convert to fraction form
    121,355.60/181,903.80 = 46,446.80/x
  3. Step 3: Cross multiply
    121,355.60x = 181,903.80 × 46,446.80
  4. Step 4: Simplify right side
    121,355.60x = 8,448,849,417.84
  5. Step 5: Solve for x
    x = 8,448,849,417.84/121,355.60
  6. Step 6: Final answer
    x = 69,620.60

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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.