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Finding the Fourth Proportional to 102,620.80, 153,931.20 and 97,809.40

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Solution

The fourth proportional to 102,620.80, 153,931.20 and 97,809.40 is: 146,714.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,620.80 : 153,931.20 = 97,809.40 : x
  2. Step 2: Convert to fraction form
    102,620.80/153,931.20 = 97,809.40/x
  3. Step 3: Cross multiply
    102,620.80x = 153,931.20 × 97,809.40
  4. Step 4: Simplify right side
    102,620.80x = 15,055,918,313.28
  5. Step 5: Solve for x
    x = 15,055,918,313.28/102,620.80
  6. Step 6: Final answer
    x = 146,714.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.