Home / 138,345.08-190,914.18-77,915.84

Finding the Fourth Proportional to 138,345.08, 190,914.18 and 77,915.84

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Solution

The fourth proportional to 138,345.08, 190,914.18 and 77,915.84 is: 107,522.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,345.08 : 190,914.18 = 77,915.84 : x
  2. Step 2: Convert to fraction form
    138,345.08/190,914.18 = 77,915.84/x
  3. Step 3: Cross multiply
    138,345.08x = 190,914.18 × 77,915.84
  4. Step 4: Simplify right side
    138,345.08x = 14,875,238,702.61
  5. Step 5: Solve for x
    x = 14,875,238,702.61/138,345.08
  6. Step 6: Final answer
    x = 107,522.72

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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.