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Finding the Fourth Proportional to 42,705.80, 63,885.90 and 37,521.80

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Solution

The fourth proportional to 42,705.80, 63,885.90 and 37,521.80 is: 56,130.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,705.80 : 63,885.90 = 37,521.80 : x
  2. Step 2: Convert to fraction form
    42,705.80/63,885.90 = 37,521.80/x
  3. Step 3: Cross multiply
    42,705.80x = 63,885.90 × 37,521.80
  4. Step 4: Simplify right side
    42,705.80x = 2,397,113,962.62
  5. Step 5: Solve for x
    x = 2,397,113,962.62/42,705.80
  6. Step 6: Final answer
    x = 56,130.88

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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.