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Finding the Fourth Proportional to 153,870.02, 212,339.82 and 85,883.08

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Solution

The fourth proportional to 153,870.02, 212,339.82 and 85,883.08 is: 118,518.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,870.02 : 212,339.82 = 85,883.08 : x
  2. Step 2: Convert to fraction form
    153,870.02/212,339.82 = 85,883.08/x
  3. Step 3: Cross multiply
    153,870.02x = 212,339.82 × 85,883.08
  4. Step 4: Simplify right side
    153,870.02x = 18,236,397,748.25
  5. Step 5: Solve for x
    x = 18,236,397,748.25/153,870.02
  6. Step 6: Final answer
    x = 118,518.20

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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.