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Finding the Fourth Proportional to 78,297.48, 108,051.30 and 42,487.79

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Solution

The fourth proportional to 78,297.48, 108,051.30 and 42,487.79 is: 58,633.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,297.48 : 108,051.30 = 42,487.79 : x
  2. Step 2: Convert to fraction form
    78,297.48/108,051.30 = 42,487.79/x
  3. Step 3: Cross multiply
    78,297.48x = 108,051.30 × 42,487.79
  4. Step 4: Simplify right side
    78,297.48x = 4,590,860,403.37
  5. Step 5: Solve for x
    x = 4,590,860,403.37/78,297.48
  6. Step 6: Final answer
    x = 58,633.57

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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.