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Finding the Fourth Proportional to 86,573.60, 129,860.40 and 47,110.40

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Solution

The fourth proportional to 86,573.60, 129,860.40 and 47,110.40 is: 70,665.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,573.60 : 129,860.40 = 47,110.40 : x
  2. Step 2: Convert to fraction form
    86,573.60/129,860.40 = 47,110.40/x
  3. Step 3: Cross multiply
    86,573.60x = 129,860.40 × 47,110.40
  4. Step 4: Simplify right side
    86,573.60x = 6,117,775,388.16
  5. Step 5: Solve for x
    x = 6,117,775,388.16/86,573.60
  6. Step 6: Final answer
    x = 70,665.60

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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.