Home / 78,045.48-117,068.34-18,880.92

Finding the Fourth Proportional to 78,045.48, 117,068.34 and 18,880.92

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Solution

The fourth proportional to 78,045.48, 117,068.34 and 18,880.92 is: 28,321.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,045.48 : 117,068.34 = 18,880.92 : x
  2. Step 2: Convert to fraction form
    78,045.48/117,068.34 = 18,880.92/x
  3. Step 3: Cross multiply
    78,045.48x = 117,068.34 × 18,880.92
  4. Step 4: Simplify right side
    78,045.48x = 2,210,357,962.07
  5. Step 5: Solve for x
    x = 2,210,357,962.07/78,045.48
  6. Step 6: Final answer
    x = 28,321.41

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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.