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Finding the Fourth Proportional to 42,446.70, 63,670.05 and 39,854.70

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Solution

The fourth proportional to 42,446.70, 63,670.05 and 39,854.70 is: 59,782.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,446.70 : 63,670.05 = 39,854.70 : x
  2. Step 2: Convert to fraction form
    42,446.70/63,670.05 = 39,854.70/x
  3. Step 3: Cross multiply
    42,446.70x = 63,670.05 × 39,854.70
  4. Step 4: Simplify right side
    42,446.70x = 2,537,550,741.74
  5. Step 5: Solve for x
    x = 2,537,550,741.74/42,446.70
  6. Step 6: Final answer
    x = 59,782.05

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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.