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Finding the Fourth Proportional to 153,876.70, 212,312.45 and 90,202.20

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Solution

The fourth proportional to 153,876.70, 212,312.45 and 90,202.20 is: 124,457.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,876.70 : 212,312.45 = 90,202.20 : x
  2. Step 2: Convert to fraction form
    153,876.70/212,312.45 = 90,202.20/x
  3. Step 3: Cross multiply
    153,876.70x = 212,312.45 × 90,202.20
  4. Step 4: Simplify right side
    153,876.70x = 19,151,050,077.39
  5. Step 5: Solve for x
    x = 19,151,050,077.39/153,876.70
  6. Step 6: Final answer
    x = 124,457.11

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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.