Home / 65,699.31-90,678.24-42,999.06

Finding the Fourth Proportional to 65,699.31, 90,678.24 and 42,999.06

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Solution

The fourth proportional to 65,699.31, 90,678.24 and 42,999.06 is: 59,347.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,699.31 : 90,678.24 = 42,999.06 : x
  2. Step 2: Convert to fraction form
    65,699.31/90,678.24 = 42,999.06/x
  3. Step 3: Cross multiply
    65,699.31x = 90,678.24 × 42,999.06
  4. Step 4: Simplify right side
    65,699.31x = 3,899,079,082.45
  5. Step 5: Solve for x
    x = 3,899,079,082.45/65,699.31
  6. Step 6: Final answer
    x = 59,347.34

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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.