Home / 145,720.44-201,088.80-81,188.16

Finding the Fourth Proportional to 145,720.44, 201,088.80 and 81,188.16

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Solution

The fourth proportional to 145,720.44, 201,088.80 and 81,188.16 is: 112,036.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,720.44 : 201,088.80 = 81,188.16 : x
  2. Step 2: Convert to fraction form
    145,720.44/201,088.80 = 81,188.16/x
  3. Step 3: Cross multiply
    145,720.44x = 201,088.80 × 81,188.16
  4. Step 4: Simplify right side
    145,720.44x = 16,326,029,668.61
  5. Step 5: Solve for x
    x = 16,326,029,668.61/145,720.44
  6. Step 6: Final answer
    x = 112,036.65

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1.5x scale

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.