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Finding the Fourth Proportional to 48,643.40, 72,770.70 and 42,141.80

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Solution

The fourth proportional to 48,643.40, 72,770.70 and 42,141.80 is: 63,044.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,643.40 : 72,770.70 = 42,141.80 : x
  2. Step 2: Convert to fraction form
    48,643.40/72,770.70 = 42,141.80/x
  3. Step 3: Cross multiply
    48,643.40x = 72,770.70 × 42,141.80
  4. Step 4: Simplify right side
    48,643.40x = 3,066,688,285.26
  5. Step 5: Solve for x
    x = 3,066,688,285.26/48,643.40
  6. Step 6: Final answer
    x = 63,044.28

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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.