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Finding the Fourth Proportional to 102,354.40, 153,312.90 and 84,858.40

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Solution

The fourth proportional to 102,354.40, 153,312.90 and 84,858.40 is: 127,106.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,354.40 : 153,312.90 = 84,858.40 : x
  2. Step 2: Convert to fraction form
    102,354.40/153,312.90 = 84,858.40/x
  3. Step 3: Cross multiply
    102,354.40x = 153,312.90 × 84,858.40
  4. Step 4: Simplify right side
    102,354.40x = 13,009,887,393.36
  5. Step 5: Solve for x
    x = 13,009,887,393.36/102,354.40
  6. Step 6: Final answer
    x = 127,106.28

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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.