Home / 138,410.06-191,006.51-77,981.63

Finding the Fourth Proportional to 138,410.06, 191,006.51 and 77,981.63

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Solution

The fourth proportional to 138,410.06, 191,006.51 and 77,981.63 is: 107,615.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,410.06 : 191,006.51 = 77,981.63 : x
  2. Step 2: Convert to fraction form
    138,410.06/191,006.51 = 77,981.63/x
  3. Step 3: Cross multiply
    138,410.06x = 191,006.51 × 77,981.63
  4. Step 4: Simplify right side
    138,410.06x = 14,894,998,990.41
  5. Step 5: Solve for x
    x = 14,894,998,990.41/138,410.06
  6. Step 6: Final answer
    x = 107,615.00

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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.