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Finding the Fourth Proportional to 101,458.89, 139,988.10 and 65,605.77

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Solution

The fourth proportional to 101,458.89, 139,988.10 and 65,605.77 is: 90,519.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,458.89 : 139,988.10 = 65,605.77 : x
  2. Step 2: Convert to fraction form
    101,458.89/139,988.10 = 65,605.77/x
  3. Step 3: Cross multiply
    101,458.89x = 139,988.10 × 65,605.77
  4. Step 4: Simplify right side
    101,458.89x = 9,184,027,091.34
  5. Step 5: Solve for x
    x = 9,184,027,091.34/101,458.89
  6. Step 6: Final answer
    x = 90,519.69

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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.