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Finding the Fourth Proportional to 64,854.85, 89,486.02 and 39,374.62

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Solution

The fourth proportional to 64,854.85, 89,486.02 and 39,374.62 is: 54,328.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,854.85 : 89,486.02 = 39,374.62 : x
  2. Step 2: Convert to fraction form
    64,854.85/89,486.02 = 39,374.62/x
  3. Step 3: Cross multiply
    64,854.85x = 89,486.02 × 39,374.62
  4. Step 4: Simplify right side
    64,854.85x = 3,523,478,032.81
  5. Step 5: Solve for x
    x = 3,523,478,032.81/64,854.85
  6. Step 6: Final answer
    x = 54,328.67

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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.