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Finding the Fourth Proportional to 85,536.40, 128,307.81 and 29,415.22

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Solution

The fourth proportional to 85,536.40, 128,307.81 and 29,415.22 is: 44,123.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,536.40 : 128,307.81 = 29,415.22 : x
  2. Step 2: Convert to fraction form
    85,536.40/128,307.81 = 29,415.22/x
  3. Step 3: Cross multiply
    85,536.40x = 128,307.81 × 29,415.22
  4. Step 4: Simplify right side
    85,536.40x = 3,774,202,458.87
  5. Step 5: Solve for x
    x = 3,774,202,458.87/85,536.40
  6. Step 6: Final answer
    x = 44,123.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.