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Finding the Fourth Proportional to 123,407.61, 170,319.40 and 71,018.49

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Solution

The fourth proportional to 123,407.61, 170,319.40 and 71,018.49 is: 98,015.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,407.61 : 170,319.40 = 71,018.49 : x
  2. Step 2: Convert to fraction form
    123,407.61/170,319.40 = 71,018.49/x
  3. Step 3: Cross multiply
    123,407.61x = 170,319.40 × 71,018.49
  4. Step 4: Simplify right side
    123,407.61x = 12,095,826,605.71
  5. Step 5: Solve for x
    x = 12,095,826,605.71/123,407.61
  6. Step 6: Final answer
    x = 98,015.24

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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.