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Finding the Fourth Proportional to 78,297.66, 108,051.06 and 42,487.66

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Solution

The fourth proportional to 78,297.66, 108,051.06 and 42,487.66 is: 58,633.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,297.66 : 108,051.06 = 42,487.66 : x
  2. Step 2: Convert to fraction form
    78,297.66/108,051.06 = 42,487.66/x
  3. Step 3: Cross multiply
    78,297.66x = 108,051.06 × 42,487.66
  4. Step 4: Simplify right side
    78,297.66x = 4,590,836,699.92
  5. Step 5: Solve for x
    x = 4,590,836,699.92/78,297.66
  6. Step 6: Final answer
    x = 58,633.13

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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.