Home / 120,020-165,625.64-66,307.28

Finding the Fourth Proportional to 120,020, 165,625.64 and 66,307.28

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Solution

The fourth proportional to 120,020, 165,625.64 and 66,307.28 is: 91,502.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,020 : 165,625.64 = 66,307.28 : x
  2. Step 2: Convert to fraction form
    120,020/165,625.64 = 66,307.28/x
  3. Step 3: Cross multiply
    120,020x = 165,625.64 × 66,307.28
  4. Step 4: Simplify right side
    120,020x = 10,982,185,686.66
  5. Step 5: Solve for x
    x = 10,982,185,686.66/120,020
  6. Step 6: Final answer
    x = 91,502.96

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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.