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Finding the Fourth Proportional to 93,781.35, 129,478.65 and 83,692.47

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Solution

The fourth proportional to 93,781.35, 129,478.65 and 83,692.47 is: 115,549.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,781.35 : 129,478.65 = 83,692.47 : x
  2. Step 2: Convert to fraction form
    93,781.35/129,478.65 = 83,692.47/x
  3. Step 3: Cross multiply
    93,781.35x = 129,478.65 × 83,692.47
  4. Step 4: Simplify right side
    93,781.35x = 10,836,388,030.77
  5. Step 5: Solve for x
    x = 10,836,388,030.77/93,781.35
  6. Step 6: Final answer
    x = 115,549.50

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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.