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Finding the Fourth Proportional to 128,075.58, 192,071.85 and 42,663.66

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Solution

The fourth proportional to 128,075.58, 192,071.85 and 42,663.66 is: 63,981.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,075.58 : 192,071.85 = 42,663.66 : x
  2. Step 2: Convert to fraction form
    128,075.58/192,071.85 = 42,663.66/x
  3. Step 3: Cross multiply
    128,075.58x = 192,071.85 × 42,663.66
  4. Step 4: Simplify right side
    128,075.58x = 8,194,488,103.97
  5. Step 5: Solve for x
    x = 8,194,488,103.97/128,075.58
  6. Step 6: Final answer
    x = 63,981.66

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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.