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Finding the Fourth Proportional to 76,389.70, 105,430.47 and 44,558.62

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Solution

The fourth proportional to 76,389.70, 105,430.47 and 44,558.62 is: 61,498.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,389.70 : 105,430.47 = 44,558.62 : x
  2. Step 2: Convert to fraction form
    76,389.70/105,430.47 = 44,558.62/x
  3. Step 3: Cross multiply
    76,389.70x = 105,430.47 × 44,558.62
  4. Step 4: Simplify right side
    76,389.70x = 4,697,836,249.15
  5. Step 5: Solve for x
    x = 4,697,836,249.15/76,389.70
  6. Step 6: Final answer
    x = 61,498.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.