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Finding the Fourth Proportional to 153,730.02, 212,128.56 and 85,731.06

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Solution

The fourth proportional to 153,730.02, 212,128.56 and 85,731.06 is: 118,298.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,730.02 : 212,128.56 = 85,731.06 : x
  2. Step 2: Convert to fraction form
    153,730.02/212,128.56 = 85,731.06/x
  3. Step 3: Cross multiply
    153,730.02x = 212,128.56 × 85,731.06
  4. Step 4: Simplify right side
    153,730.02x = 18,186,006,305.07
  5. Step 5: Solve for x
    x = 18,186,006,305.07/153,730.02
  6. Step 6: Final answer
    x = 118,298.34

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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.