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Finding the Fourth Proportional to 151,512.84, 209,083.68 and 86,980.20

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Solution

The fourth proportional to 151,512.84, 209,083.68 and 86,980.20 is: 120,030.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,512.84 : 209,083.68 = 86,980.20 : x
  2. Step 2: Convert to fraction form
    151,512.84/209,083.68 = 86,980.20/x
  3. Step 3: Cross multiply
    151,512.84x = 209,083.68 × 86,980.20
  4. Step 4: Simplify right side
    151,512.84x = 18,186,140,303.14
  5. Step 5: Solve for x
    x = 18,186,140,303.14/151,512.84
  6. Step 6: Final answer
    x = 120,030.36

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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.