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Finding the Fourth Proportional to 91,670.80, 126,507 and 55,862.32

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Solution

The fourth proportional to 91,670.80, 126,507 and 55,862.32 is: 77,090.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,670.80 : 126,507 = 55,862.32 : x
  2. Step 2: Convert to fraction form
    91,670.80/126,507 = 55,862.32/x
  3. Step 3: Cross multiply
    91,670.80x = 126,507 × 55,862.32
  4. Step 4: Simplify right side
    91,670.80x = 7,066,974,516.24
  5. Step 5: Solve for x
    x = 7,066,974,516.24/91,670.80
  6. Step 6: Final answer
    x = 77,090.79

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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.