Home / 78,045.20-107,702.65-42,235.21

Finding the Fourth Proportional to 78,045.20, 107,702.65 and 42,235.21

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Solution

The fourth proportional to 78,045.20, 107,702.65 and 42,235.21 is: 58,284.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,045.20 : 107,702.65 = 42,235.21 : x
  2. Step 2: Convert to fraction form
    78,045.20/107,702.65 = 42,235.21/x
  3. Step 3: Cross multiply
    78,045.20x = 107,702.65 × 42,235.21
  4. Step 4: Simplify right side
    78,045.20x = 4,548,843,501.79
  5. Step 5: Solve for x
    x = 4,548,843,501.79/78,045.20
  6. Step 6: Final answer
    x = 58,284.73

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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.