Home / 86,420.34-129,628.08-47,225.66

Finding the Fourth Proportional to 86,420.34, 129,628.08 and 47,225.66

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Solution

The fourth proportional to 86,420.34, 129,628.08 and 47,225.66 is: 70,837.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,420.34 : 129,628.08 = 47,225.66 : x
  2. Step 2: Convert to fraction form
    86,420.34/129,628.08 = 47,225.66/x
  3. Step 3: Cross multiply
    86,420.34x = 129,628.08 × 47,225.66
  4. Step 4: Simplify right side
    86,420.34x = 6,121,770,984.39
  5. Step 5: Solve for x
    x = 6,121,770,984.39/86,420.34
  6. Step 6: Final answer
    x = 70,837.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.