Home / 85,700.85-128,577.55-38,355.81

Finding the Fourth Proportional to 85,700.85, 128,577.55 and 38,355.81

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Solution

The fourth proportional to 85,700.85, 128,577.55 and 38,355.81 is: 57,545.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,700.85 : 128,577.55 = 38,355.81 : x
  2. Step 2: Convert to fraction form
    85,700.85/128,577.55 = 38,355.81/x
  3. Step 3: Cross multiply
    85,700.85x = 128,577.55 × 38,355.81
  4. Step 4: Simplify right side
    85,700.85x = 4,931,696,078.07
  5. Step 5: Solve for x
    x = 4,931,696,078.07/85,700.85
  6. Step 6: Final answer
    x = 57,545.47

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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.