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Finding the Fourth Proportional to 64,807.60, 97,211.40 and 21,031.60

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Solution

The fourth proportional to 64,807.60, 97,211.40 and 21,031.60 is: 31,547.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,807.60 : 97,211.40 = 21,031.60 : x
  2. Step 2: Convert to fraction form
    64,807.60/97,211.40 = 21,031.60/x
  3. Step 3: Cross multiply
    64,807.60x = 97,211.40 × 21,031.60
  4. Step 4: Simplify right side
    64,807.60x = 2,044,511,280.24
  5. Step 5: Solve for x
    x = 2,044,511,280.24/64,807.60
  6. Step 6: Final answer
    x = 31,547.40

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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.