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Finding the Fourth Proportional to 129,804.72, 179,130.78 and 73,216.32

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Solution

The fourth proportional to 129,804.72, 179,130.78 and 73,216.32 is: 101,038.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,804.72 : 179,130.78 = 73,216.32 : x
  2. Step 2: Convert to fraction form
    129,804.72/179,130.78 = 73,216.32/x
  3. Step 3: Cross multiply
    129,804.72x = 179,130.78 × 73,216.32
  4. Step 4: Simplify right side
    129,804.72x = 13,115,296,510.33
  5. Step 5: Solve for x
    x = 13,115,296,510.33/129,804.72
  6. Step 6: Final answer
    x = 101,038.67

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1.5x scale

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.