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Finding the Fourth Proportional to 70,590.40, 105,929.46 and 43,988.60

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Solution

The fourth proportional to 70,590.40, 105,929.46 and 43,988.60 is: 66,010.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,590.40 : 105,929.46 = 43,988.60 : x
  2. Step 2: Convert to fraction form
    70,590.40/105,929.46 = 43,988.60/x
  3. Step 3: Cross multiply
    70,590.40x = 105,929.46 × 43,988.60
  4. Step 4: Simplify right side
    70,590.40x = 4,659,688,644.16
  5. Step 5: Solve for x
    x = 4,659,688,644.16/70,590.40
  6. Step 6: Final answer
    x = 66,010.23

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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.