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Finding the Fourth Proportional to 130,555, 180,166.38 and 70,939

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Solution

The fourth proportional to 130,555, 180,166.38 and 70,939 is: 97,896.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,555 : 180,166.38 = 70,939 : x
  2. Step 2: Convert to fraction form
    130,555/180,166.38 = 70,939/x
  3. Step 3: Cross multiply
    130,555x = 180,166.38 × 70,939
  4. Step 4: Simplify right side
    130,555x = 12,780,822,830.82
  5. Step 5: Solve for x
    x = 12,780,822,830.82/130,555
  6. Step 6: Final answer
    x = 97,896.08

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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.