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Finding the Fourth Proportional to 93,508.80, 140,608.80 and 78,302.40

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Solution

The fourth proportional to 93,508.80, 140,608.80 and 78,302.40 is: 117,743.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,508.80 : 140,608.80 = 78,302.40 : x
  2. Step 2: Convert to fraction form
    93,508.80/140,608.80 = 78,302.40/x
  3. Step 3: Cross multiply
    93,508.80x = 140,608.80 × 78,302.40
  4. Step 4: Simplify right side
    93,508.80x = 11,010,006,501.12
  5. Step 5: Solve for x
    x = 11,010,006,501.12/93,508.80
  6. Step 6: Final answer
    x = 117,743.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.