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Finding the Fourth Proportional to 115,389.60, 172,987.20 and 59,985.60

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Solution

The fourth proportional to 115,389.60, 172,987.20 and 59,985.60 is: 89,927.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,389.60 : 172,987.20 = 59,985.60 : x
  2. Step 2: Convert to fraction form
    115,389.60/172,987.20 = 59,985.60/x
  3. Step 3: Cross multiply
    115,389.60x = 172,987.20 × 59,985.60
  4. Step 4: Simplify right side
    115,389.60x = 10,376,740,984.32
  5. Step 5: Solve for x
    x = 10,376,740,984.32/115,389.60
  6. Step 6: Final answer
    x = 89,927.87

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1.5x scale

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.