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Finding the Fourth Proportional to 86,070.86, 129,135.45 and 43,968.68

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Solution

The fourth proportional to 86,070.86, 129,135.45 and 43,968.68 is: 65,967.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,070.86 : 129,135.45 = 43,968.68 : x
  2. Step 2: Convert to fraction form
    86,070.86/129,135.45 = 43,968.68/x
  3. Step 3: Cross multiply
    86,070.86x = 129,135.45 × 43,968.68
  4. Step 4: Simplify right side
    86,070.86x = 5,677,915,277.71
  5. Step 5: Solve for x
    x = 5,677,915,277.71/86,070.86
  6. Step 6: Final answer
    x = 65,967.92

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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.