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Finding the Fourth Proportional to 144,025.80, 216,038.70 and 138,193.80

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Solution

The fourth proportional to 144,025.80, 216,038.70 and 138,193.80 is: 207,290.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,025.80 : 216,038.70 = 138,193.80 : x
  2. Step 2: Convert to fraction form
    144,025.80/216,038.70 = 138,193.80/x
  3. Step 3: Cross multiply
    144,025.80x = 216,038.70 × 138,193.80
  4. Step 4: Simplify right side
    144,025.80x = 29,855,208,900.06
  5. Step 5: Solve for x
    x = 29,855,208,900.06/144,025.80
  6. Step 6: Final answer
    x = 207,290.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.