Home / 138,602.17-191,270.73-78,172.63

Finding the Fourth Proportional to 138,602.17, 191,270.73 and 78,172.63

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Solution

The fourth proportional to 138,602.17, 191,270.73 and 78,172.63 is: 107,878.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,602.17 : 191,270.73 = 78,172.63 : x
  2. Step 2: Convert to fraction form
    138,602.17/191,270.73 = 78,172.63/x
  3. Step 3: Cross multiply
    138,602.17x = 191,270.73 × 78,172.63
  4. Step 4: Simplify right side
    138,602.17x = 14,952,136,006.12
  5. Step 5: Solve for x
    x = 14,952,136,006.12/138,602.17
  6. Step 6: Final answer
    x = 107,878.08

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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.