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Finding the Fourth Proportional to 93,316.80, 140,320.80 and 78,110.40

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Solution

The fourth proportional to 93,316.80, 140,320.80 and 78,110.40 is: 117,454.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,316.80 : 140,320.80 = 78,110.40 : x
  2. Step 2: Convert to fraction form
    93,316.80/140,320.80 = 78,110.40/x
  3. Step 3: Cross multiply
    93,316.80x = 140,320.80 × 78,110.40
  4. Step 4: Simplify right side
    93,316.80x = 10,960,513,816.32
  5. Step 5: Solve for x
    x = 10,960,513,816.32/93,316.80
  6. Step 6: Final answer
    x = 117,454.88

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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.