Home / 76,307.45-105,309.66-42,319.18

Finding the Fourth Proportional to 76,307.45, 105,309.66 and 42,319.18

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Solution

The fourth proportional to 76,307.45, 105,309.66 and 42,319.18 is: 58,403.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,307.45 : 105,309.66 = 42,319.18 : x
  2. Step 2: Convert to fraction form
    76,307.45/105,309.66 = 42,319.18/x
  3. Step 3: Cross multiply
    76,307.45x = 105,309.66 × 42,319.18
  4. Step 4: Simplify right side
    76,307.45x = 4,456,618,747.61
  5. Step 5: Solve for x
    x = 4,456,618,747.61/76,307.45
  6. Step 6: Final answer
    x = 58,403.46

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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.