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Finding the Fourth Proportional to 86,871.40, 130,307.10 and 53,483.20

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Solution

The fourth proportional to 86,871.40, 130,307.10 and 53,483.20 is: 80,224.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,871.40 : 130,307.10 = 53,483.20 : x
  2. Step 2: Convert to fraction form
    86,871.40/130,307.10 = 53,483.20/x
  3. Step 3: Cross multiply
    86,871.40x = 130,307.10 × 53,483.20
  4. Step 4: Simplify right side
    86,871.40x = 6,969,240,690.72
  5. Step 5: Solve for x
    x = 6,969,240,690.72/86,871.40
  6. Step 6: Final answer
    x = 80,224.80

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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.