Home / 123,931.36-170,938.80-81,476.32

Finding the Fourth Proportional to 123,931.36, 170,938.80 and 81,476.32

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Solution

The fourth proportional to 123,931.36, 170,938.80 and 81,476.32 is: 112,380.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,931.36 : 170,938.80 = 81,476.32 : x
  2. Step 2: Convert to fraction form
    123,931.36/170,938.80 = 81,476.32/x
  3. Step 3: Cross multiply
    123,931.36x = 170,938.80 × 81,476.32
  4. Step 4: Simplify right side
    123,931.36x = 13,927,464,369.22
  5. Step 5: Solve for x
    x = 13,927,464,369.22/123,931.36
  6. Step 6: Final answer
    x = 112,380.47

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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.