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Finding the Fourth Proportional to 78,476.33, 108,297.59 and 42,666.32

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Solution

The fourth proportional to 78,476.33, 108,297.59 and 42,666.32 is: 58,879.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,476.33 : 108,297.59 = 42,666.32 : x
  2. Step 2: Convert to fraction form
    78,476.33/108,297.59 = 42,666.32/x
  3. Step 3: Cross multiply
    78,476.33x = 108,297.59 × 42,666.32
  4. Step 4: Simplify right side
    78,476.33x = 4,620,658,875.35
  5. Step 5: Solve for x
    x = 4,620,658,875.35/78,476.33
  6. Step 6: Final answer
    x = 58,879.65

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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.