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Finding the Fourth Proportional to 86,678.40, 130,060.80 and 49,267.20

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Solution

The fourth proportional to 86,678.40, 130,060.80 and 49,267.20 is: 73,925.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,678.40 : 130,060.80 = 49,267.20 : x
  2. Step 2: Convert to fraction form
    86,678.40/130,060.80 = 49,267.20/x
  3. Step 3: Cross multiply
    86,678.40x = 130,060.80 × 49,267.20
  4. Step 4: Simplify right side
    86,678.40x = 6,407,731,445.76
  5. Step 5: Solve for x
    x = 6,407,731,445.76/86,678.40
  6. Step 6: Final answer
    x = 73,925.35

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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.