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Finding the Fourth Proportional to 153,878.59, 212,363.13 and 85,908.93

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Solution

The fourth proportional to 153,878.59, 212,363.13 and 85,908.93 is: 118,560.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,878.59 : 212,363.13 = 85,908.93 : x
  2. Step 2: Convert to fraction form
    153,878.59/212,363.13 = 85,908.93/x
  3. Step 3: Cross multiply
    153,878.59x = 212,363.13 × 85,908.93
  4. Step 4: Simplify right side
    153,878.59x = 18,243,889,269.75
  5. Step 5: Solve for x
    x = 18,243,889,269.75/153,878.59
  6. Step 6: Final answer
    x = 118,560.28

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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.