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Finding the Fourth Proportional to 97,316.80, 145,975.20 and 80,695.60

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Solution

The fourth proportional to 97,316.80, 145,975.20 and 80,695.60 is: 121,043.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,316.80 : 145,975.20 = 80,695.60 : x
  2. Step 2: Convert to fraction form
    97,316.80/145,975.20 = 80,695.60/x
  3. Step 3: Cross multiply
    97,316.80x = 145,975.20 × 80,695.60
  4. Step 4: Simplify right side
    97,316.80x = 11,779,556,349.12
  5. Step 5: Solve for x
    x = 11,779,556,349.12/97,316.80
  6. Step 6: Final answer
    x = 121,043.40

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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.