Home / 85,880.10-118,515.70-64,331.67

Finding the Fourth Proportional to 85,880.10, 118,515.70 and 64,331.67

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Solution

The fourth proportional to 85,880.10, 118,515.70 and 64,331.67 is: 88,778.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,880.10 : 118,515.70 = 64,331.67 : x
  2. Step 2: Convert to fraction form
    85,880.10/118,515.70 = 64,331.67/x
  3. Step 3: Cross multiply
    85,880.10x = 118,515.70 × 64,331.67
  4. Step 4: Simplify right side
    85,880.10x = 7,624,312,148.81
  5. Step 5: Solve for x
    x = 7,624,312,148.81/85,880.10
  6. Step 6: Final answer
    x = 88,778.57

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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.