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Finding the Fourth Proportional to 155,978.40, 233,967.60 and 89,623.20

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Solution

The fourth proportional to 155,978.40, 233,967.60 and 89,623.20 is: 134,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,978.40 : 233,967.60 = 89,623.20 : x
  2. Step 2: Convert to fraction form
    155,978.40/233,967.60 = 89,623.20/x
  3. Step 3: Cross multiply
    155,978.40x = 233,967.60 × 89,623.20
  4. Step 4: Simplify right side
    155,978.40x = 20,968,925,008.32
  5. Step 5: Solve for x
    x = 20,968,925,008.32/155,978.40
  6. Step 6: Final answer
    x = 134,434.80

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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.