Home / 103,436.22-142,748.07-77,897.55

Finding the Fourth Proportional to 103,436.22, 142,748.07 and 77,897.55

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Solution

The fourth proportional to 103,436.22, 142,748.07 and 77,897.55 is: 107,503.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,436.22 : 142,748.07 = 77,897.55 : x
  2. Step 2: Convert to fraction form
    103,436.22/142,748.07 = 77,897.55/x
  3. Step 3: Cross multiply
    103,436.22x = 142,748.07 × 77,897.55
  4. Step 4: Simplify right side
    103,436.22x = 11,119,724,920.23
  5. Step 5: Solve for x
    x = 11,119,724,920.23/103,436.22
  6. Step 6: Final answer
    x = 107,503.20

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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.