Home / 123,428.47-170,399.08-77,535.98

Finding the Fourth Proportional to 123,428.47, 170,399.08 and 77,535.98

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Solution

The fourth proportional to 123,428.47, 170,399.08 and 77,535.98 is: 107,042.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,428.47 : 170,399.08 = 77,535.98 : x
  2. Step 2: Convert to fraction form
    123,428.47/170,399.08 = 77,535.98/x
  3. Step 3: Cross multiply
    123,428.47x = 170,399.08 × 77,535.98
  4. Step 4: Simplify right side
    123,428.47x = 13,212,060,392.28
  5. Step 5: Solve for x
    x = 13,212,060,392.28/123,428.47
  6. Step 6: Final answer
    x = 107,042.24

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1.5x scale

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.