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Finding the Fourth Proportional to 76,336.39, 105,345.91 and 42,343.77

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Solution

The fourth proportional to 76,336.39, 105,345.91 and 42,343.77 is: 58,435.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,336.39 : 105,345.91 = 42,343.77 : x
  2. Step 2: Convert to fraction form
    76,336.39/105,345.91 = 42,343.77/x
  3. Step 3: Cross multiply
    76,336.39x = 105,345.91 × 42,343.77
  4. Step 4: Simplify right side
    76,336.39x = 4,460,742,983.48
  5. Step 5: Solve for x
    x = 4,460,742,983.48/76,336.39
  6. Step 6: Final answer
    x = 58,435.34

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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.