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Finding the Fourth Proportional to 144,291.36, 216,480.78 and 69,390.30

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Solution

The fourth proportional to 144,291.36, 216,480.78 and 69,390.30 is: 104,106.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,291.36 : 216,480.78 = 69,390.30 : x
  2. Step 2: Convert to fraction form
    144,291.36/216,480.78 = 69,390.30/x
  3. Step 3: Cross multiply
    144,291.36x = 216,480.78 × 69,390.30
  4. Step 4: Simplify right side
    144,291.36x = 15,021,666,268.43
  5. Step 5: Solve for x
    x = 15,021,666,268.43/144,291.36
  6. Step 6: Final answer
    x = 104,106.48

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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.