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Finding the Fourth Proportional to 145,208.69, 200,386.51 and 79,798.59

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Solution

The fourth proportional to 145,208.69, 200,386.51 and 79,798.59 is: 110,121.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,208.69 : 200,386.51 = 79,798.59 : x
  2. Step 2: Convert to fraction form
    145,208.69/200,386.51 = 79,798.59/x
  3. Step 3: Cross multiply
    145,208.69x = 200,386.51 × 79,798.59
  4. Step 4: Simplify right side
    145,208.69x = 15,990,560,953.02
  5. Step 5: Solve for x
    x = 15,990,560,953.02/145,208.69
  6. Step 6: Final answer
    x = 110,121.24

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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.