Home / 76,799.40-105,983.65-42,810.05

Finding the Fourth Proportional to 76,799.40, 105,983.65 and 42,810.05

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Solution

The fourth proportional to 76,799.40, 105,983.65 and 42,810.05 is: 59,078.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,799.40 : 105,983.65 = 42,810.05 : x
  2. Step 2: Convert to fraction form
    76,799.40/105,983.65 = 42,810.05/x
  3. Step 3: Cross multiply
    76,799.40x = 105,983.65 × 42,810.05
  4. Step 4: Simplify right side
    76,799.40x = 4,537,164,718.74
  5. Step 5: Solve for x
    x = 4,537,164,718.74/76,799.40
  6. Step 6: Final answer
    x = 59,078.13

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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.