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Finding the Fourth Proportional to 74,959.80, 112,439.70 and 28,223.16

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Solution

The fourth proportional to 74,959.80, 112,439.70 and 28,223.16 is: 42,334.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,959.80 : 112,439.70 = 28,223.16 : x
  2. Step 2: Convert to fraction form
    74,959.80/112,439.70 = 28,223.16/x
  3. Step 3: Cross multiply
    74,959.80x = 112,439.70 × 28,223.16
  4. Step 4: Simplify right side
    74,959.80x = 3,173,403,643.45
  5. Step 5: Solve for x
    x = 3,173,403,643.45/74,959.80
  6. Step 6: Final answer
    x = 42,334.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.