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Finding the Fourth Proportional to 115,365.40, 173,048.10 and 85,840.90

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Solution

The fourth proportional to 115,365.40, 173,048.10 and 85,840.90 is: 128,761.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,365.40 : 173,048.10 = 85,840.90 : x
  2. Step 2: Convert to fraction form
    115,365.40/173,048.10 = 85,840.90/x
  3. Step 3: Cross multiply
    115,365.40x = 173,048.10 × 85,840.90
  4. Step 4: Simplify right side
    115,365.40x = 14,854,604,647.29
  5. Step 5: Solve for x
    x = 14,854,604,647.29/115,365.40
  6. Step 6: Final answer
    x = 128,761.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.