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Finding the Fourth Proportional to 145,321.65, 200,641.75 and 129,960.54

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Solution

The fourth proportional to 145,321.65, 200,641.75 and 129,960.54 is: 179,433.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,321.65 : 200,641.75 = 129,960.54 : x
  2. Step 2: Convert to fraction form
    145,321.65/200,641.75 = 129,960.54/x
  3. Step 3: Cross multiply
    145,321.65x = 200,641.75 × 129,960.54
  4. Step 4: Simplify right side
    145,321.65x = 26,075,509,851.64
  5. Step 5: Solve for x
    x = 26,075,509,851.64/145,321.65
  6. Step 6: Final answer
    x = 179,433.07

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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.