Home / 78,045.16-107,702.32-42,235.17

Finding the Fourth Proportional to 78,045.16, 107,702.32 and 42,235.17

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Solution

The fourth proportional to 78,045.16, 107,702.32 and 42,235.17 is: 58,284.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,045.16 : 107,702.32 = 42,235.17 : x
  2. Step 2: Convert to fraction form
    78,045.16/107,702.32 = 42,235.17/x
  3. Step 3: Cross multiply
    78,045.16x = 107,702.32 × 42,235.17
  4. Step 4: Simplify right side
    78,045.16x = 4,548,825,583.42
  5. Step 5: Solve for x
    x = 4,548,825,583.42/78,045.16
  6. Step 6: Final answer
    x = 58,284.53

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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.