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Finding the Fourth Proportional to 130,495, 180,083.28 and 70,879

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Solution

The fourth proportional to 130,495, 180,083.28 and 70,879 is: 97,813.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,495 : 180,083.28 = 70,879 : x
  2. Step 2: Convert to fraction form
    130,495/180,083.28 = 70,879/x
  3. Step 3: Cross multiply
    130,495x = 180,083.28 × 70,879
  4. Step 4: Simplify right side
    130,495x = 12,764,122,803.12
  5. Step 5: Solve for x
    x = 12,764,122,803.12/130,495
  6. Step 6: Final answer
    x = 97,813.12

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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.