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Finding the Fourth Proportional to 78,491.84, 117,782.40 and 45,259.52

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Solution

The fourth proportional to 78,491.84, 117,782.40 and 45,259.52 is: 67,915.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491.84 : 117,782.40 = 45,259.52 : x
  2. Step 2: Convert to fraction form
    78,491.84/117,782.40 = 45,259.52/x
  3. Step 3: Cross multiply
    78,491.84x = 117,782.40 × 45,259.52
  4. Step 4: Simplify right side
    78,491.84x = 5,330,774,888.45
  5. Step 5: Solve for x
    x = 5,330,774,888.45/78,491.84
  6. Step 6: Final answer
    x = 67,915.02

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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.