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Finding the Fourth Proportional to 153,700.73, 212,106.59 and 85,717.78

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Solution

The fourth proportional to 153,700.73, 212,106.59 and 85,717.78 is: 118,290.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,700.73 : 212,106.59 = 85,717.78 : x
  2. Step 2: Convert to fraction form
    153,700.73/212,106.59 = 85,717.78/x
  3. Step 3: Cross multiply
    153,700.73x = 212,106.59 × 85,717.78
  4. Step 4: Simplify right side
    153,700.73x = 18,181,306,018.17
  5. Step 5: Solve for x
    x = 18,181,306,018.17/153,700.73
  6. Step 6: Final answer
    x = 118,290.30

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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.