Home / 76,800.81-105,985.60-42,811.46

Finding the Fourth Proportional to 76,800.81, 105,985.60 and 42,811.46

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Solution

The fourth proportional to 76,800.81, 105,985.60 and 42,811.46 is: 59,080.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,800.81 : 105,985.60 = 42,811.46 : x
  2. Step 2: Convert to fraction form
    76,800.81/105,985.60 = 42,811.46/x
  3. Step 3: Cross multiply
    76,800.81x = 105,985.60 × 42,811.46
  4. Step 4: Simplify right side
    76,800.81x = 4,537,397,638.02
  5. Step 5: Solve for x
    x = 4,537,397,638.02/76,800.81
  6. Step 6: Final answer
    x = 59,080.08

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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.