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Finding the Fourth Proportional to 124,868.68, 172,270.62 and 77,039.08

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Solution

The fourth proportional to 124,868.68, 172,270.62 and 77,039.08 is: 106,284.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,868.68 : 172,270.62 = 77,039.08 : x
  2. Step 2: Convert to fraction form
    124,868.68/172,270.62 = 77,039.08/x
  3. Step 3: Cross multiply
    124,868.68x = 172,270.62 × 77,039.08
  4. Step 4: Simplify right side
    124,868.68x = 13,271,570,075.83
  5. Step 5: Solve for x
    x = 13,271,570,075.83/124,868.68
  6. Step 6: Final answer
    x = 106,284.22

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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.