Home / 78,314,809.20-117,472,213.80-47,703,807.60

Finding the Fourth Proportional to 78,314,809.20, 117,472,213.80 and 47,703,807.60

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Solution

The fourth proportional to 78,314,809.20, 117,472,213.80 and 47,703,807.60 is: 71,555,711.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,314,809.20 : 117,472,213.80 = 47,703,807.60 : x
  2. Step 2: Convert to fraction form
    78,314,809.20/117,472,213.80 = 47,703,807.60/x
  3. Step 3: Cross multiply
    78,314,809.20x = 117,472,213.80 × 47,703,807.60
  4. Step 4: Simplify right side
    78,314,809.20x = 5,603,871,885,461,265
  5. Step 5: Solve for x
    x = 5,603,871,885,461,265/78,314,809.20
  6. Step 6: Final answer
    x = 71,555,711.40

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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.