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Finding the Fourth Proportional to 130,385.98, 179,960.73 and 79,415.51

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Solution

The fourth proportional to 130,385.98, 179,960.73 and 79,415.51 is: 109,610.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,385.98 : 179,960.73 = 79,415.51 : x
  2. Step 2: Convert to fraction form
    130,385.98/179,960.73 = 79,415.51/x
  3. Step 3: Cross multiply
    130,385.98x = 179,960.73 × 79,415.51
  4. Step 4: Simplify right side
    130,385.98x = 14,291,673,602.82
  5. Step 5: Solve for x
    x = 14,291,673,602.82/130,385.98
  6. Step 6: Final answer
    x = 109,610.51

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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.