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Finding the Fourth Proportional to 78,316.63, 108,077.06 and 42,506.63

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Solution

The fourth proportional to 78,316.63, 108,077.06 and 42,506.63 is: 58,659.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,316.63 : 108,077.06 = 42,506.63 : x
  2. Step 2: Convert to fraction form
    78,316.63/108,077.06 = 42,506.63/x
  3. Step 3: Cross multiply
    78,316.63x = 108,077.06 × 42,506.63
  4. Step 4: Simplify right side
    78,316.63x = 4,593,991,718.34
  5. Step 5: Solve for x
    x = 4,593,991,718.34/78,316.63
  6. Step 6: Final answer
    x = 58,659.21

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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.