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Finding the Fourth Proportional to 510,643.80, 765,965.70 and 136,666.80

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Solution

The fourth proportional to 510,643.80, 765,965.70 and 136,666.80 is: 205,000.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,643.80 : 765,965.70 = 136,666.80 : x
  2. Step 2: Convert to fraction form
    510,643.80/765,965.70 = 136,666.80/x
  3. Step 3: Cross multiply
    510,643.80x = 765,965.70 × 136,666.80
  4. Step 4: Simplify right side
    510,643.80x = 104,682,081,128.76
  5. Step 5: Solve for x
    x = 104,682,081,128.76/510,643.80
  6. Step 6: Final answer
    x = 205,000.20

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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.