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Finding the Fourth Proportional to 42,703.20, 63,939.60 and 42,703.20

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Solution

The fourth proportional to 42,703.20, 63,939.60 and 42,703.20 is: 63,939.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,703.20 : 63,939.60 = 42,703.20 : x
  2. Step 2: Convert to fraction form
    42,703.20/63,939.60 = 42,703.20/x
  3. Step 3: Cross multiply
    42,703.20x = 63,939.60 × 42,703.20
  4. Step 4: Simplify right side
    42,703.20x = 2,730,425,526.72
  5. Step 5: Solve for x
    x = 2,730,425,526.72/42,703.20
  6. Step 6: Final answer
    x = 63,939.60

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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.