Home / 157,721.04-217,587.40-90,638.80

Finding the Fourth Proportional to 157,721.04, 217,587.40 and 90,638.80

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Solution

The fourth proportional to 157,721.04, 217,587.40 and 90,638.80 is: 125,042.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,721.04 : 217,587.40 = 90,638.80 : x
  2. Step 2: Convert to fraction form
    157,721.04/217,587.40 = 90,638.80/x
  3. Step 3: Cross multiply
    157,721.04x = 217,587.40 × 90,638.80
  4. Step 4: Simplify right side
    157,721.04x = 19,721,860,831.12
  5. Step 5: Solve for x
    x = 19,721,860,831.12/157,721.04
  6. Step 6: Final answer
    x = 125,042.68

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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.