Home / 78,000.13-117,014.77-31,256.65

Finding the Fourth Proportional to 78,000.13, 117,014.77 and 31,256.65

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Solution

The fourth proportional to 78,000.13, 117,014.77 and 31,256.65 is: 46,890.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,000.13 : 117,014.77 = 31,256.65 : x
  2. Step 2: Convert to fraction form
    78,000.13/117,014.77 = 31,256.65/x
  3. Step 3: Cross multiply
    78,000.13x = 117,014.77 × 31,256.65
  4. Step 4: Simplify right side
    78,000.13x = 3,657,489,710.72
  5. Step 5: Solve for x
    x = 3,657,489,710.72/78,000.13
  6. Step 6: Final answer
    x = 46,890.82

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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.