Home / 102,189.81-141,181.93-78,075.19

Finding the Fourth Proportional to 102,189.81, 141,181.93 and 78,075.19

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Solution

The fourth proportional to 102,189.81, 141,181.93 and 78,075.19 is: 107,866.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,189.81 : 141,181.93 = 78,075.19 : x
  2. Step 2: Convert to fraction form
    102,189.81/141,181.93 = 78,075.19/x
  3. Step 3: Cross multiply
    102,189.81x = 141,181.93 × 78,075.19
  4. Step 4: Simplify right side
    102,189.81x = 11,022,806,009.32
  5. Step 5: Solve for x
    x = 11,022,806,009.32/102,189.81
  6. Step 6: Final answer
    x = 107,866.00

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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.