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Finding the Fourth Proportional to 78,378.64, 108,165.08 and 44,386.40

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Solution

The fourth proportional to 78,378.64, 108,165.08 and 44,386.40 is: 61,254.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,378.64 : 108,165.08 = 44,386.40 : x
  2. Step 2: Convert to fraction form
    78,378.64/108,165.08 = 44,386.40/x
  3. Step 3: Cross multiply
    78,378.64x = 108,165.08 × 44,386.40
  4. Step 4: Simplify right side
    78,378.64x = 4,801,057,827.38
  5. Step 5: Solve for x
    x = 4,801,057,827.38/78,378.64
  6. Step 6: Final answer
    x = 61,254.67

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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.