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Finding the Fourth Proportional to 64,430.80, 86,705.10 and 64,430.80

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Solution

The fourth proportional to 64,430.80, 86,705.10 and 64,430.80 is: 86,705.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,430.80 : 86,705.10 = 64,430.80 : x
  2. Step 2: Convert to fraction form
    64,430.80/86,705.10 = 64,430.80/x
  3. Step 3: Cross multiply
    64,430.80x = 86,705.10 × 64,430.80
  4. Step 4: Simplify right side
    64,430.80x = 5,586,478,957.08
  5. Step 5: Solve for x
    x = 5,586,478,957.08/64,430.80
  6. Step 6: Final answer
    x = 86,705.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.