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Finding the Fourth Proportional to 78,735.76, 108,655.28 and 42,925.77

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Solution

The fourth proportional to 78,735.76, 108,655.28 and 42,925.77 is: 59,237.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,735.76 : 108,655.28 = 42,925.77 : x
  2. Step 2: Convert to fraction form
    78,735.76/108,655.28 = 42,925.77/x
  3. Step 3: Cross multiply
    78,735.76x = 108,655.28 × 42,925.77
  4. Step 4: Simplify right side
    78,735.76x = 4,664,110,800.66
  5. Step 5: Solve for x
    x = 4,664,110,800.66/78,735.76
  6. Step 6: Final answer
    x = 59,237.52

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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.