Home / 78,534.40-117,762.16-36,378.24

Finding the Fourth Proportional to 78,534.40, 117,762.16 and 36,378.24

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Solution

The fourth proportional to 78,534.40, 117,762.16 and 36,378.24 is: 54,549.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,534.40 : 117,762.16 = 36,378.24 : x
  2. Step 2: Convert to fraction form
    78,534.40/117,762.16 = 36,378.24/x
  3. Step 3: Cross multiply
    78,534.40x = 117,762.16 × 36,378.24
  4. Step 4: Simplify right side
    78,534.40x = 4,283,980,119.40
  5. Step 5: Solve for x
    x = 4,283,980,119.40/78,534.40
  6. Step 6: Final answer
    x = 54,549.09

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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.