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Finding the Fourth Proportional to 86,935,987.20, 130,120,545.60 and 86,935,987.20

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Solution

The fourth proportional to 86,935,987.20, 130,120,545.60 and 86,935,987.20 is: 130,120,545.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,935,987.20 : 130,120,545.60 = 86,935,987.20 : x
  2. Step 2: Convert to fraction form
    86,935,987.20/130,120,545.60 = 86,935,987.20/x
  3. Step 3: Cross multiply
    86,935,987.20x = 130,120,545.60 × 86,935,987.20
  4. Step 4: Simplify right side
    86,935,987.20x = 11,312,158,086,738,616
  5. Step 5: Solve for x
    x = 11,312,158,086,738,616/86,935,987.20
  6. Step 6: Final answer
    x = 130,120,545.60

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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.