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Finding the Fourth Proportional to 145,322.65, 200,643.13 and 129,961.54

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Solution

The fourth proportional to 145,322.65, 200,643.13 and 129,961.54 is: 179,434.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,322.65 : 200,643.13 = 129,961.54 : x
  2. Step 2: Convert to fraction form
    145,322.65/200,643.13 = 129,961.54/x
  3. Step 3: Cross multiply
    145,322.65x = 200,643.13 × 129,961.54
  4. Step 4: Simplify right side
    145,322.65x = 26,075,890,165.22
  5. Step 5: Solve for x
    x = 26,075,890,165.22/145,322.65
  6. Step 6: Final answer
    x = 179,434.45

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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.