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Finding the Fourth Proportional to 97,726.40, 137,128 and 97,726.40

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Solution

The fourth proportional to 97,726.40, 137,128 and 97,726.40 is: 137,128

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,726.40 : 137,128 = 97,726.40 : x
  2. Step 2: Convert to fraction form
    97,726.40/137,128 = 97,726.40/x
  3. Step 3: Cross multiply
    97,726.40x = 137,128 × 97,726.40
  4. Step 4: Simplify right side
    97,726.40x = 13,401,025,779.20
  5. Step 5: Solve for x
    x = 13,401,025,779.20/97,726.40
  6. Step 6: Final answer
    x = 137,128

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.