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Finding the Fourth Proportional to 154,695.77, 213,490.02 and 86,712.76

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Solution

The fourth proportional to 154,695.77, 213,490.02 and 86,712.76 is: 119,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,695.77 : 213,490.02 = 86,712.76 : x
  2. Step 2: Convert to fraction form
    154,695.77/213,490.02 = 86,712.76/x
  3. Step 3: Cross multiply
    154,695.77x = 213,490.02 × 86,712.76
  4. Step 4: Simplify right side
    154,695.77x = 18,512,308,658.10
  5. Step 5: Solve for x
    x = 18,512,308,658.10/154,695.77
  6. Step 6: Final answer
    x = 119,669.13

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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.