Home / 85,428.47-128,146.23-29,307.17

Finding the Fourth Proportional to 85,428.47, 128,146.23 and 29,307.17

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Solution

The fourth proportional to 85,428.47, 128,146.23 and 29,307.17 is: 43,961.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,428.47 : 128,146.23 = 29,307.17 : x
  2. Step 2: Convert to fraction form
    85,428.47/128,146.23 = 29,307.17/x
  3. Step 3: Cross multiply
    85,428.47x = 128,146.23 × 29,307.17
  4. Step 4: Simplify right side
    85,428.47x = 3,755,603,667.83
  5. Step 5: Solve for x
    x = 3,755,603,667.83/85,428.47
  6. Step 6: Final answer
    x = 43,961.97

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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.