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Finding the Fourth Proportional to 139,518.48, 189,959.68 and 139,075.62

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Solution

The fourth proportional to 139,518.48, 189,959.68 and 139,075.62 is: 189,356.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,518.48 : 189,959.68 = 139,075.62 : x
  2. Step 2: Convert to fraction form
    139,518.48/189,959.68 = 139,075.62/x
  3. Step 3: Cross multiply
    139,518.48x = 189,959.68 × 139,075.62
  4. Step 4: Simplify right side
    139,518.48x = 26,418,760,271.00
  5. Step 5: Solve for x
    x = 26,418,760,271.00/139,518.48
  6. Step 6: Final answer
    x = 189,356.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.