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Finding the Fourth Proportional to 125,243.76, 172,830.96 and 74,970.48

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Solution

The fourth proportional to 125,243.76, 172,830.96 and 74,970.48 is: 103,456.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,243.76 : 172,830.96 = 74,970.48 : x
  2. Step 2: Convert to fraction form
    125,243.76/172,830.96 = 74,970.48/x
  3. Step 3: Cross multiply
    125,243.76x = 172,830.96 × 74,970.48
  4. Step 4: Simplify right side
    125,243.76x = 12,957,220,030.06
  5. Step 5: Solve for x
    x = 12,957,220,030.06/125,243.76
  6. Step 6: Final answer
    x = 103,456.01

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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.