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Finding the Fourth Proportional to 121,189.68, 181,699.76 and 53,688.84

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Solution

The fourth proportional to 121,189.68, 181,699.76 and 53,688.84 is: 80,495.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,189.68 : 181,699.76 = 53,688.84 : x
  2. Step 2: Convert to fraction form
    121,189.68/181,699.76 = 53,688.84/x
  3. Step 3: Cross multiply
    121,189.68x = 181,699.76 × 53,688.84
  4. Step 4: Simplify right side
    121,189.68x = 9,755,249,342.68
  5. Step 5: Solve for x
    x = 9,755,249,342.68/121,189.68
  6. Step 6: Final answer
    x = 80,495.71

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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.