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Finding the Fourth Proportional to 130,896.80, 180,636.24 and 71,280.80

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Solution

The fourth proportional to 130,896.80, 180,636.24 and 71,280.80 is: 98,366.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,896.80 : 180,636.24 = 71,280.80 : x
  2. Step 2: Convert to fraction form
    130,896.80/180,636.24 = 71,280.80/x
  3. Step 3: Cross multiply
    130,896.80x = 180,636.24 × 71,280.80
  4. Step 4: Simplify right side
    130,896.80x = 12,875,895,696.19
  5. Step 5: Solve for x
    x = 12,875,895,696.19/130,896.80
  6. Step 6: Final answer
    x = 98,366.77

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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.