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Finding the Fourth Proportional to 153,684.76, 212,088.72 and 85,701.08

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Solution

The fourth proportional to 153,684.76, 212,088.72 and 85,701.08 is: 118,269.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,684.76 : 212,088.72 = 85,701.08 : x
  2. Step 2: Convert to fraction form
    153,684.76/212,088.72 = 85,701.08/x
  3. Step 3: Cross multiply
    153,684.76x = 212,088.72 × 85,701.08
  4. Step 4: Simplify right side
    153,684.76x = 18,176,232,359.82
  5. Step 5: Solve for x
    x = 18,176,232,359.82/153,684.76
  6. Step 6: Final answer
    x = 118,269.58

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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.