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Finding the Fourth Proportional to 42,430.40, 63,645.60 and 32,619.20

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Solution

The fourth proportional to 42,430.40, 63,645.60 and 32,619.20 is: 48,928.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,430.40 : 63,645.60 = 32,619.20 : x
  2. Step 2: Convert to fraction form
    42,430.40/63,645.60 = 32,619.20/x
  3. Step 3: Cross multiply
    42,430.40x = 63,645.60 × 32,619.20
  4. Step 4: Simplify right side
    42,430.40x = 2,076,068,555.52
  5. Step 5: Solve for x
    x = 2,076,068,555.52/42,430.40
  6. Step 6: Final answer
    x = 48,928.80

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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.