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Finding the Fourth Proportional to 153,875.79, 212,384.01 and 90,234.09

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Solution

The fourth proportional to 153,875.79, 212,384.01 and 90,234.09 is: 124,543.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,875.79 : 212,384.01 = 90,234.09 : x
  2. Step 2: Convert to fraction form
    153,875.79/212,384.01 = 90,234.09/x
  3. Step 3: Cross multiply
    153,875.79x = 212,384.01 × 90,234.09
  4. Step 4: Simplify right side
    153,875.79x = 19,164,276,359.81
  5. Step 5: Solve for x
    x = 19,164,276,359.81/153,875.79
  6. Step 6: Final answer
    x = 124,543.81

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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.