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Finding the Fourth Proportional to 177,748.65, 245,130.57 and 138,991.50

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Solution

The fourth proportional to 177,748.65, 245,130.57 and 138,991.50 is: 191,681.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,748.65 : 245,130.57 = 138,991.50 : x
  2. Step 2: Convert to fraction form
    177,748.65/245,130.57 = 138,991.50/x
  3. Step 3: Cross multiply
    177,748.65x = 245,130.57 × 138,991.50
  4. Step 4: Simplify right side
    177,748.65x = 34,071,065,620.16
  5. Step 5: Solve for x
    x = 34,071,065,620.16/177,748.65
  6. Step 6: Final answer
    x = 191,681.15

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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.