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Finding the Fourth Proportional to 153,703.74, 212,111.01 and 85,726.74

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Solution

The fourth proportional to 153,703.74, 212,111.01 and 85,726.74 is: 118,302.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,703.74 : 212,111.01 = 85,726.74 : x
  2. Step 2: Convert to fraction form
    153,703.74/212,111.01 = 85,726.74/x
  3. Step 3: Cross multiply
    153,703.74x = 212,111.01 × 85,726.74
  4. Step 4: Simplify right side
    153,703.74x = 18,183,585,405.41
  5. Step 5: Solve for x
    x = 18,183,585,405.41/153,703.74
  6. Step 6: Final answer
    x = 118,302.82

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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.