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Finding the Fourth Proportional to 99,315.20, 139,225.60 and 99,315.20

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Solution

The fourth proportional to 99,315.20, 139,225.60 and 99,315.20 is: 139,225.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,315.20 : 139,225.60 = 99,315.20 : x
  2. Step 2: Convert to fraction form
    99,315.20/139,225.60 = 99,315.20/x
  3. Step 3: Cross multiply
    99,315.20x = 139,225.60 × 99,315.20
  4. Step 4: Simplify right side
    99,315.20x = 13,827,218,309.12
  5. Step 5: Solve for x
    x = 13,827,218,309.12/99,315.20
  6. Step 6: Final answer
    x = 139,225.60

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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.