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Finding the Fourth Proportional to 158,275.77, 218,420.55 and 86,655.77

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Solution

The fourth proportional to 158,275.77, 218,420.55 and 86,655.77 is: 119,584.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,275.77 : 218,420.55 = 86,655.77 : x
  2. Step 2: Convert to fraction form
    158,275.77/218,420.55 = 86,655.77/x
  3. Step 3: Cross multiply
    158,275.77x = 218,420.55 × 86,655.77
  4. Step 4: Simplify right side
    158,275.77x = 18,927,401,899.66
  5. Step 5: Solve for x
    x = 18,927,401,899.66/158,275.77
  6. Step 6: Final answer
    x = 119,584.96

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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.