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Finding the Fourth Proportional to 76,477.55, 105,538.92 and 42,489.17

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Solution

The fourth proportional to 76,477.55, 105,538.92 and 42,489.17 is: 58,635.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,477.55 : 105,538.92 = 42,489.17 : x
  2. Step 2: Convert to fraction form
    76,477.55/105,538.92 = 42,489.17/x
  3. Step 3: Cross multiply
    76,477.55x = 105,538.92 × 42,489.17
  4. Step 4: Simplify right side
    76,477.55x = 4,484,261,774.40
  5. Step 5: Solve for x
    x = 4,484,261,774.40/76,477.55
  6. Step 6: Final answer
    x = 58,635.01

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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.