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Finding the Fourth Proportional to 86,672.40, 130,051.80 and 49,261.20

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Solution

The fourth proportional to 86,672.40, 130,051.80 and 49,261.20 is: 73,916.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,672.40 : 130,051.80 = 49,261.20 : x
  2. Step 2: Convert to fraction form
    86,672.40/130,051.80 = 49,261.20/x
  3. Step 3: Cross multiply
    86,672.40x = 130,051.80 × 49,261.20
  4. Step 4: Simplify right side
    86,672.40x = 6,406,507,730.16
  5. Step 5: Solve for x
    x = 6,406,507,730.16/86,672.40
  6. Step 6: Final answer
    x = 73,916.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.