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Finding the Fourth Proportional to 101,387.17, 139,915.21 and 56,068.21

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Solution

The fourth proportional to 101,387.17, 139,915.21 and 56,068.21 is: 77,374.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,387.17 : 139,915.21 = 56,068.21 : x
  2. Step 2: Convert to fraction form
    101,387.17/139,915.21 = 56,068.21/x
  3. Step 3: Cross multiply
    101,387.17x = 139,915.21 × 56,068.21
  4. Step 4: Simplify right side
    101,387.17x = 7,844,794,466.64
  5. Step 5: Solve for x
    x = 7,844,794,466.64/101,387.17
  6. Step 6: Final answer
    x = 77,374.63

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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.