Home / 78,587.85-117,880.63-19,423.53

Finding the Fourth Proportional to 78,587.85, 117,880.63 and 19,423.53

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Solution

The fourth proportional to 78,587.85, 117,880.63 and 19,423.53 is: 29,135.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.85 : 117,880.63 = 19,423.53 : x
  2. Step 2: Convert to fraction form
    78,587.85/117,880.63 = 19,423.53/x
  3. Step 3: Cross multiply
    78,587.85x = 117,880.63 × 19,423.53
  4. Step 4: Simplify right side
    78,587.85x = 2,289,657,953.22
  5. Step 5: Solve for x
    x = 2,289,657,953.22/78,587.85
  6. Step 6: Final answer
    x = 29,135.01

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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.