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Finding the Fourth Proportional to 157,212.30, 235,818.45 and 78,480.30

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Solution

The fourth proportional to 157,212.30, 235,818.45 and 78,480.30 is: 117,720.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,212.30 : 235,818.45 = 78,480.30 : x
  2. Step 2: Convert to fraction form
    157,212.30/235,818.45 = 78,480.30/x
  3. Step 3: Cross multiply
    157,212.30x = 235,818.45 × 78,480.30
  4. Step 4: Simplify right side
    157,212.30x = 18,507,102,701.54
  5. Step 5: Solve for x
    x = 18,507,102,701.54/157,212.30
  6. Step 6: Final answer
    x = 117,720.45

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1.5x scale

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.