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Finding the Fourth Proportional to 153,959.13, 212,451.48 and 85,970.79

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Solution

The fourth proportional to 153,959.13, 212,451.48 and 85,970.79 is: 118,632.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,959.13 : 212,451.48 = 85,970.79 : x
  2. Step 2: Convert to fraction form
    153,959.13/212,451.48 = 85,970.79/x
  3. Step 3: Cross multiply
    153,959.13x = 212,451.48 × 85,970.79
  4. Step 4: Simplify right side
    153,959.13x = 18,264,621,572.27
  5. Step 5: Solve for x
    x = 18,264,621,572.27/153,959.13
  6. Step 6: Final answer
    x = 118,632.92

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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.