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Finding the Fourth Proportional to 75,312.20, 112,968.30 and 19,152.20

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Solution

The fourth proportional to 75,312.20, 112,968.30 and 19,152.20 is: 28,728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,312.20 : 112,968.30 = 19,152.20 : x
  2. Step 2: Convert to fraction form
    75,312.20/112,968.30 = 19,152.20/x
  3. Step 3: Cross multiply
    75,312.20x = 112,968.30 × 19,152.20
  4. Step 4: Simplify right side
    75,312.20x = 2,163,591,475.26
  5. Step 5: Solve for x
    x = 2,163,591,475.26/75,312.20
  6. Step 6: Final answer
    x = 28,728.30

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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.