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Finding the Fourth Proportional to 139,357.16, 192,392.68 and 91,748.91

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Solution

The fourth proportional to 139,357.16, 192,392.68 and 91,748.91 is: 126,666.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,357.16 : 192,392.68 = 91,748.91 : x
  2. Step 2: Convert to fraction form
    139,357.16/192,392.68 = 91,748.91/x
  3. Step 3: Cross multiply
    139,357.16x = 192,392.68 × 91,748.91
  4. Step 4: Simplify right side
    139,357.16x = 17,651,818,075.19
  5. Step 5: Solve for x
    x = 17,651,818,075.19/139,357.16
  6. Step 6: Final answer
    x = 126,666.03

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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.