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Finding the Fourth Proportional to 145,959.06, 201,423.45 and 78,891.06

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Solution

The fourth proportional to 145,959.06, 201,423.45 and 78,891.06 is: 108,869.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,959.06 : 201,423.45 = 78,891.06 : x
  2. Step 2: Convert to fraction form
    145,959.06/201,423.45 = 78,891.06/x
  3. Step 3: Cross multiply
    145,959.06x = 201,423.45 × 78,891.06
  4. Step 4: Simplify right side
    145,959.06x = 15,890,509,479.36
  5. Step 5: Solve for x
    x = 15,890,509,479.36/145,959.06
  6. Step 6: Final answer
    x = 108,869.63

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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.