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Finding the Fourth Proportional to 145,878.85, 217,284.10 and 139,053.25

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Solution

The fourth proportional to 145,878.85, 217,284.10 and 139,053.25 is: 207,117.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,878.85 : 217,284.10 = 139,053.25 : x
  2. Step 2: Convert to fraction form
    145,878.85/217,284.10 = 139,053.25/x
  3. Step 3: Cross multiply
    145,878.85x = 217,284.10 × 139,053.25
  4. Step 4: Simplify right side
    145,878.85x = 30,214,060,278.33
  5. Step 5: Solve for x
    x = 30,214,060,278.33/145,878.85
  6. Step 6: Final answer
    x = 207,117.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.