Home / 78,045.03-107,702.14-42,235.05

Finding the Fourth Proportional to 78,045.03, 107,702.14 and 42,235.05

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Solution

The fourth proportional to 78,045.03, 107,702.14 and 42,235.05 is: 58,284.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,045.03 : 107,702.14 = 42,235.05 : x
  2. Step 2: Convert to fraction form
    78,045.03/107,702.14 = 42,235.05/x
  3. Step 3: Cross multiply
    78,045.03x = 107,702.14 × 42,235.05
  4. Step 4: Simplify right side
    78,045.03x = 4,548,804,758.54
  5. Step 5: Solve for x
    x = 4,548,804,758.54/78,045.03
  6. Step 6: Final answer
    x = 58,284.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.