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Finding the Fourth Proportional to 74,312.10, 111,468.15 and 42,819.30

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Solution

The fourth proportional to 74,312.10, 111,468.15 and 42,819.30 is: 64,228.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,312.10 : 111,468.15 = 42,819.30 : x
  2. Step 2: Convert to fraction form
    74,312.10/111,468.15 = 42,819.30/x
  3. Step 3: Cross multiply
    74,312.10x = 111,468.15 × 42,819.30
  4. Step 4: Simplify right side
    74,312.10x = 4,772,988,155.30
  5. Step 5: Solve for x
    x = 4,772,988,155.30/74,312.10
  6. Step 6: Final answer
    x = 64,228.95

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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.