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Finding the Fourth Proportional to 86,573.40, 129,860.10 and 86,573.40

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Solution

The fourth proportional to 86,573.40, 129,860.10 and 86,573.40 is: 129,860.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,573.40 : 129,860.10 = 86,573.40 : x
  2. Step 2: Convert to fraction form
    86,573.40/129,860.10 = 86,573.40/x
  3. Step 3: Cross multiply
    86,573.40x = 129,860.10 × 86,573.40
  4. Step 4: Simplify right side
    86,573.40x = 11,242,430,381.34
  5. Step 5: Solve for x
    x = 11,242,430,381.34/86,573.40
  6. Step 6: Final answer
    x = 129,860.10

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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.