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Finding the Fourth Proportional to 99,637.80, 139,596.60 and 99,637.80

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Solution

The fourth proportional to 99,637.80, 139,596.60 and 99,637.80 is: 139,596.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,637.80 : 139,596.60 = 99,637.80 : x
  2. Step 2: Convert to fraction form
    99,637.80/139,596.60 = 99,637.80/x
  3. Step 3: Cross multiply
    99,637.80x = 139,596.60 × 99,637.80
  4. Step 4: Simplify right side
    99,637.80x = 13,909,098,111.48
  5. Step 5: Solve for x
    x = 13,909,098,111.48/99,637.80
  6. Step 6: Final answer
    x = 139,596.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.