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Finding the Fourth Proportional to 101,376.79, 139,893.95 and 56,051.21

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Solution

The fourth proportional to 101,376.79, 139,893.95 and 56,051.21 is: 77,347.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,376.79 : 139,893.95 = 56,051.21 : x
  2. Step 2: Convert to fraction form
    101,376.79/139,893.95 = 56,051.21/x
  3. Step 3: Cross multiply
    101,376.79x = 139,893.95 × 56,051.21
  4. Step 4: Simplify right side
    101,376.79x = 7,841,225,501.84
  5. Step 5: Solve for x
    x = 7,841,225,501.84/101,376.79
  6. Step 6: Final answer
    x = 77,347.35

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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.