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Finding the Fourth Proportional to 78,368.60, 117,617.70 and 36,313.40

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Solution

The fourth proportional to 78,368.60, 117,617.70 and 36,313.40 is: 54,500.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,368.60 : 117,617.70 = 36,313.40 : x
  2. Step 2: Convert to fraction form
    78,368.60/117,617.70 = 36,313.40/x
  3. Step 3: Cross multiply
    78,368.60x = 117,617.70 × 36,313.40
  4. Step 4: Simplify right side
    78,368.60x = 4,271,098,587.18
  5. Step 5: Solve for x
    x = 4,271,098,587.18/78,368.60
  6. Step 6: Final answer
    x = 54,500.13

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1.5x scale

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.