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Finding the Fourth Proportional to 145,959.60, 201,424.25 and 78,891.60

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Solution

The fourth proportional to 145,959.60, 201,424.25 and 78,891.60 is: 108,870.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,959.60 : 201,424.25 = 78,891.60 : x
  2. Step 2: Convert to fraction form
    145,959.60/201,424.25 = 78,891.60/x
  3. Step 3: Cross multiply
    145,959.60x = 201,424.25 × 78,891.60
  4. Step 4: Simplify right side
    145,959.60x = 15,890,680,966.84
  5. Step 5: Solve for x
    x = 15,890,680,966.84/145,959.60
  6. Step 6: Final answer
    x = 108,870.41

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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.