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Finding the Fourth Proportional to 153,903.90, 230,330.70 and 128,972.10

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Solution

The fourth proportional to 153,903.90, 230,330.70 and 128,972.10 is: 193,018.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,903.90 : 230,330.70 = 128,972.10 : x
  2. Step 2: Convert to fraction form
    153,903.90/230,330.70 = 128,972.10/x
  3. Step 3: Cross multiply
    153,903.90x = 230,330.70 × 128,972.10
  4. Step 4: Simplify right side
    153,903.90x = 29,706,234,073.47
  5. Step 5: Solve for x
    x = 29,706,234,073.47/153,903.90
  6. Step 6: Final answer
    x = 193,018.07

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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.