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Finding the Fourth Proportional to 101,457.79, 139,925.84 and 61,162.72

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Solution

The fourth proportional to 101,457.79, 139,925.84 and 61,162.72 is: 84,352.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,457.79 : 139,925.84 = 61,162.72 : x
  2. Step 2: Convert to fraction form
    101,457.79/139,925.84 = 61,162.72/x
  3. Step 3: Cross multiply
    101,457.79x = 139,925.84 × 61,162.72
  4. Step 4: Simplify right side
    101,457.79x = 8,558,244,317.06
  5. Step 5: Solve for x
    x = 8,558,244,317.06/101,457.79
  6. Step 6: Final answer
    x = 84,352.76

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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.