Home / 85,639.95-128,312.26-56,770.87

Finding the Fourth Proportional to 85,639.95, 128,312.26 and 56,770.87

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Solution

The fourth proportional to 85,639.95, 128,312.26 and 56,770.87 is: 85,058.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,639.95 : 128,312.26 = 56,770.87 : x
  2. Step 2: Convert to fraction form
    85,639.95/128,312.26 = 56,770.87/x
  3. Step 3: Cross multiply
    85,639.95x = 128,312.26 × 56,770.87
  4. Step 4: Simplify right side
    85,639.95x = 7,284,398,631.87
  5. Step 5: Solve for x
    x = 7,284,398,631.87/85,639.95
  6. Step 6: Final answer
    x = 85,058.42

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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.