Home / 76,110.31-105,030.07-42,120.21

Finding the Fourth Proportional to 76,110.31, 105,030.07 and 42,120.21

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Solution

The fourth proportional to 76,110.31, 105,030.07 and 42,120.21 is: 58,124.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,110.31 : 105,030.07 = 42,120.21 : x
  2. Step 2: Convert to fraction form
    76,110.31/105,030.07 = 42,120.21/x
  3. Step 3: Cross multiply
    76,110.31x = 105,030.07 × 42,120.21
  4. Step 4: Simplify right side
    76,110.31x = 4,423,888,604.71
  5. Step 5: Solve for x
    x = 4,423,888,604.71/76,110.31
  6. Step 6: Final answer
    x = 58,124.70

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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.