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Finding the Fourth Proportional to 145,329.28, 218,023.80 and 61,039.84

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Solution

The fourth proportional to 145,329.28, 218,023.80 and 61,039.84 is: 91,572.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,329.28 : 218,023.80 = 61,039.84 : x
  2. Step 2: Convert to fraction form
    145,329.28/218,023.80 = 61,039.84/x
  3. Step 3: Cross multiply
    145,329.28x = 218,023.80 × 61,039.84
  4. Step 4: Simplify right side
    145,329.28x = 13,308,137,868.19
  5. Step 5: Solve for x
    x = 13,308,137,868.19/145,329.28
  6. Step 6: Final answer
    x = 91,572.31

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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.