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Finding the Fourth Proportional to 78,695.07, 108,599.19 and 42,885.07

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Solution

The fourth proportional to 78,695.07, 108,599.19 and 42,885.07 is: 59,181.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,695.07 : 108,599.19 = 42,885.07 : x
  2. Step 2: Convert to fraction form
    78,695.07/108,599.19 = 42,885.07/x
  3. Step 3: Cross multiply
    78,695.07x = 108,599.19 × 42,885.07
  4. Step 4: Simplify right side
    78,695.07x = 4,657,283,865.09
  5. Step 5: Solve for x
    x = 4,657,283,865.09/78,695.07
  6. Step 6: Final answer
    x = 59,181.39

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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.