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Finding the Fourth Proportional to 45,746.40, 68,662.80 and 28,250.40

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Solution

The fourth proportional to 45,746.40, 68,662.80 and 28,250.40 is: 42,402.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,746.40 : 68,662.80 = 28,250.40 : x
  2. Step 2: Convert to fraction form
    45,746.40/68,662.80 = 28,250.40/x
  3. Step 3: Cross multiply
    45,746.40x = 68,662.80 × 28,250.40
  4. Step 4: Simplify right side
    45,746.40x = 1,939,751,565.12
  5. Step 5: Solve for x
    x = 1,939,751,565.12/45,746.40
  6. Step 6: Final answer
    x = 42,402.28

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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.