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Finding the Fourth Proportional to 113,989, 157,304.88 and 63,688

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Solution

The fourth proportional to 113,989, 157,304.88 and 63,688 is: 87,889.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,989 : 157,304.88 = 63,688 : x
  2. Step 2: Convert to fraction form
    113,989/157,304.88 = 63,688/x
  3. Step 3: Cross multiply
    113,989x = 157,304.88 × 63,688
  4. Step 4: Simplify right side
    113,989x = 10,018,433,197.44
  5. Step 5: Solve for x
    x = 10,018,433,197.44/113,989
  6. Step 6: Final answer
    x = 87,889.47

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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.