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Finding the Fourth Proportional to 115,045.80, 158,762.88 and 64,744.80

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Solution

The fourth proportional to 115,045.80, 158,762.88 and 64,744.80 is: 89,347.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,045.80 : 158,762.88 = 64,744.80 : x
  2. Step 2: Convert to fraction form
    115,045.80/158,762.88 = 64,744.80/x
  3. Step 3: Cross multiply
    115,045.80x = 158,762.88 × 64,744.80
  4. Step 4: Simplify right side
    115,045.80x = 10,279,070,913.02
  5. Step 5: Solve for x
    x = 10,279,070,913.02/115,045.80
  6. Step 6: Final answer
    x = 89,347.64

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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.