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Finding the Fourth Proportional to 153,765.76, 212,147.52 and 90,102.40

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Solution

The fourth proportional to 153,765.76, 212,147.52 and 90,102.40 is: 124,312.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,765.76 : 212,147.52 = 90,102.40 : x
  2. Step 2: Convert to fraction form
    153,765.76/212,147.52 = 90,102.40/x
  3. Step 3: Cross multiply
    153,765.76x = 212,147.52 × 90,102.40
  4. Step 4: Simplify right side
    153,765.76x = 19,115,000,706.05
  5. Step 5: Solve for x
    x = 19,115,000,706.05/153,765.76
  6. Step 6: Final answer
    x = 124,312.47

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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.