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Finding the Fourth Proportional to 78,898.01, 108,878.70 and 43,088.03

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Solution

The fourth proportional to 78,898.01, 108,878.70 and 43,088.03 is: 59,461.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,898.01 : 108,878.70 = 43,088.03 : x
  2. Step 2: Convert to fraction form
    78,898.01/108,878.70 = 43,088.03/x
  3. Step 3: Cross multiply
    78,898.01x = 108,878.70 × 43,088.03
  4. Step 4: Simplify right side
    78,898.01x = 4,691,368,691.96
  5. Step 5: Solve for x
    x = 4,691,368,691.96/78,898.01
  6. Step 6: Final answer
    x = 59,461.18

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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.