Home / 128,349.21-177,118.81-70,987.04

Finding the Fourth Proportional to 128,349.21, 177,118.81 and 70,987.04

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Solution

The fourth proportional to 128,349.21, 177,118.81 and 70,987.04 is: 97,960.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,349.21 : 177,118.81 = 70,987.04 : x
  2. Step 2: Convert to fraction form
    128,349.21/177,118.81 = 70,987.04/x
  3. Step 3: Cross multiply
    128,349.21x = 177,118.81 × 70,987.04
  4. Step 4: Simplify right side
    128,349.21x = 12,573,140,050.22
  5. Step 5: Solve for x
    x = 12,573,140,050.22/128,349.21
  6. Step 6: Final answer
    x = 97,960.40

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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.