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Finding the Fourth Proportional to 154,970.76, 213,862.80 and 86,992.63

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Solution

The fourth proportional to 154,970.76, 213,862.80 and 86,992.63 is: 120,051.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,970.76 : 213,862.80 = 86,992.63 : x
  2. Step 2: Convert to fraction form
    154,970.76/213,862.80 = 86,992.63/x
  3. Step 3: Cross multiply
    154,970.76x = 213,862.80 × 86,992.63
  4. Step 4: Simplify right side
    154,970.76x = 18,604,487,431.16
  5. Step 5: Solve for x
    x = 18,604,487,431.16/154,970.76
  6. Step 6: Final answer
    x = 120,051.60

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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.